Post Satchel Guide: Prices, Sizes, Delivery Times and Best Value Options
Search for the extra small satchel dimensions and the large/extra large dimensions to complete the table:Google “post satchel” and you’ll get a U.S. postal worker’s shoulder bag, a $998 Ralph Lauren leather accessory, and a wall of Amazon marketplace listings. Not a single result that helps an Australian figure out the cheapest way to send a parcel this week.
This guide fixes that. It covers the Australia Post prepaid post satchel – what it is, what it costs, which size fits your item, and how fast it arrives. Whether you’re a small business owner shipping 200 orders a month or someone sending a birthday gift interstate, the goal is the same: spend the right amount, pick the right product, and get it out the door without second-guessing yourself.
You’ll find current pricing tables (effective 1 July 2025), a size-by-size breakdown with real item examples, delivery windows for both Parcel Post and Express Post, and a clear framework for deciding when a satchel beats a box – or when a courier booking makes more sense. Everything a first-time or frequent shipper needs, in one place.
Quick Summary
A post satchel is prepaid packaging – It’s a poly or padded envelope from Australia Post that includes both postage and packaging in one flat price, used to send items up to 5 kg anywhere in Australia.
Five sizes, one weight cap – Extra Small through Extra Large, all sharing the same 5 kg limit. Price is based on satchel size, not what the item weighs.
Current pricing runs from $10.05 to $32.30 – Parcel Post satchels start at $10.05 (Extra Small) and Express Post tops out at $32.30 (Extra Large), effective 1 July 2025.
Delivery takes 1-6 business days – Parcel Post runs 2-4 days same state and 3-6 interstate; Express Post cuts that to 1-3 business days.
Satchels win for flat, flexible, non-fragile items – Apparel, documents, and accessories are ideal. Fragile, heavy, or oddly shaped goods often suit a box or courier booking instead.
Bulk buying lowers your unit cost – Buying 10+ satchels of the same size drops the per-unit price, and for higher volumes a courier platform with instant quotes can be more flexible.
What a Post Satchel Is
A post satchel is a prepaid, poly or padded envelope sold by Australia Post that includes both the packaging and the postage in a single flat price. It’s used to send small parcels weighing up to 5 kg to any address in Australia. You buy the satchel, pack your item, address it, and lodge it – no separate postage step required.
To be clear: this article isn’t about the heavy-duty shoulder bags that USPS mail carriers use on their routes, and it’s not about the Ralph Lauren leather satchel from their limited USPS-inspired fashion collection. We’re talking about the prepaid mailing satchel you grab at a post office or order from auspost.com.au to ship something.
Postage for prepaid satchels is based on size, not weight. That’s the core pricing logic. You pick a size tier, and whether your satchel holds 200 g or 4.5 kg, the cost stays the same. These prices include packaging and postage for sending within Australia.
Satchels come in two service levels. Parcel Post gives you standard delivery, while Express Post is the faster option with priority handling. Prepaid Parcel Post satchels offer a convenient way to send parcels anywhere within Australia, with delivery in two or more business days. Both formats include a tracking number, so you and the recipient can follow the parcel from lodgement to delivery.
Post Satchel Sizes, Weight Limits, and What Fits Inside
Australia Post sells prepaid satchels in five sizes, with Extra Small available from 1 July 2025. All five share the same maximum weight of 5 kg – the difference is the physical dimensions of the satchel itself.
| Size | Dimensions (mm) | Weight Limit | Example Items That Fit | Best For |
|---|---|---|---|---|
| Extra Small | ~220 x 160 | 5 kg | Phone cases, jewellery, USB drives, small documents | Single small items, accessories |
| Small | 355 x 225 | 5 kg | Folded t-shirt, paperback book, small electronics | Individual apparel items, books |
| Medium | 390 x 270 | 5 kg | 2-3 clothing items, shoes (flat), tablet, small gifts | Mid-size e-commerce orders |
| Large | 405 x 315 | 5 kg | Multiple garments, board games, small electronics in packaging | Larger apparel bundles, mixed orders |
| Extra Large | 510 x 440 | 5 kg | Bulky jackets, multiple books, larger electronics | High-volume or bulky-but-light shipments |
Small Parcel Post Satchels measure 355 x 225mm. Medium Parcel Post Satchels measure 390 x 270mm. Extra Large Parcel Post Satchels measure 510 x 440mm.
A quick heads-up on the weight-vs-size trap: all five sizes share the same 5 kg cap, which means a heavy-but-small item (like a dense metal part at 4.8 kg) might fit the weight limit of an Extra Small satchel but won’t physically fit inside. Always check both the size chart and your item’s packed dimensions before buying. Satchels, bags, and mailers expand when filled, so laying your item on a flat satchel can be a useful test – but when in doubt, go one size up.
How Much a Post Satchel Costs
All prices below are effective 1st July 2025 per Australia Post’s retail pricing update. The 2025 price increase ranged from 1.52% to 1.95% for all prepaid Parcel Post and Express Post satchels.
Parcel Post Prepaid Satchels (Standard Delivery)
| Size | Single Price | Bulk (10+) | Notes |
|---|---|---|---|
| Extra Small | $10.05 | Lower per-unit rate | New from July/August 2025 |
| Small | $11.50 | Lower per-unit rate | Most popular for single-item orders |
| Medium | $15.65 | Lower per-unit rate | Sweet spot for apparel sellers |
| Large | $19.75 | Lower per-unit rate | Suits multi-item e-commerce shipments |
| Extra Large | $23.80 | Lower per-unit rate | Best for bulky, lightweight goods |
Express Post Prepaid Satchels (Priority Delivery)
| Size | Single Price | Bulk (10+) | Notes |
|---|---|---|---|
| Extra Small | $13.05 | Lower per-unit rate | Fastest option for small items |
| Small | $15.00 | Lower per-unit rate | $3.50 premium over Parcel Post Small |
| Medium | $19.65 | Lower per-unit rate | Good for urgent mid-size parcels |
| Large | $24.25 | Lower per-unit rate | Priority handling for larger shipments |
| Extra Large | $32.30 | Lower per-unit rate | Highest flat rate in the satchel range |
Postage for prepaid satchels is based on size, not weight. These prices include packaging and postage for sending within Australia.
Here’s where the maths matters for business buyers: a Parcel Post Small at $11.50 vs an Express Post Small at $15.00 is a $3.50 gap per parcel. Send 200 parcels a year and that gap becomes $700. Service selection isn’t just about speed – it’s a budget decision. Buying 10 or more satchels of the same size also lowers your per-unit cost, so it’s worth calculating annual volume before defaulting to single purchases.
Post Satchel Delivery Times and Tracking
Most competitor pages skip this part entirely, which is odd because delivery speed is half the reason you’re choosing a satchel in the first place.
| Service | Same State | Interstate | Notes |
|---|---|---|---|
| Parcel Post | 2-4 business days | 3-6 business days | Standard delivery, tracking included |
| Express Post | 1-2+ business days | 1-3+ business days | Priority handling, faster transit |
Delivery times are measured in business days (Monday to Friday, excluding public holidays), and actual transit varies by origin and destination postcode – not just state borders. A Sydney-to-Melbourne Express Post satchel will typically arrive faster than a Perth-to-Cairns one, even though both are interstate.
Every prepaid post satchel includes a tracking number. Senders and recipients can follow the parcel through Australia Post’s tracking portal from the moment it’s lodged. Optional extras like Extra Cover, Signature on Delivery, and Email Track Advice are also available.
Australia Post has invested in delivery notification technology over the last few years. Up to 5% discount is available for five or more International Express satchels of the same size to the same zone, which is a useful fact for businesses shipping overseas. On the domestic side, two-hour ETA delivery notifications are now available for a large share of parcel volumes, giving recipients a tighter window and reducing missed deliveries.
Remote and regional areas may fall outside standard delivery windows. If you’re shipping to rural postcodes, check Australia Post’s delivery estimator for a more accurate timeframe before setting customer expectations.
When a Post Satchel Is Better Than a Box
This isn’t about one option being universally superior. It’s about matching the packaging to the item and the budget.
| Criteria | Prepaid Satchel | Cardboard Box | Courier Booking |
|---|---|---|---|
| Best for | Flat, flexible, non-fragile items | Fragile, bulky, oddly shaped goods | Heavy items, mixed parcel types |
| Risk | Low for soft goods; higher for breakables | Low if packed well | Depends on courier and packaging |
| Speed | Parcel Post or Express Post | Same services available | Same-day to multi-day options |
| Cost logic | Flat rate by size (up to 5 kg) | Postage by weight/cubic + box cost | Quote-based, weight and distance |
| Packaging included | Yes | No (buy separately) | No (use your own) |
| Tracking | Yes | Yes (with postage) | Yes |
A few real-world scenarios to make this concrete:
E-commerce apparel and accessories – Satchel wins. A folded dress in a Small satchel for $11.50 is hard to beat on cost.
Fragile ceramics or electronics – Box wins. Rigid protection matters more than flat-rate savings.
Urgent business documents – Express Post satchel is competitive and simple.
Large or irregularly shaped items – Courier booking with a box gives you more flexibility, especially for items over 5 kg.
Customer returns – Satchels are often the easiest prepaid return option.
One trap to watch: a satchel is priced by size, so a large but lightweight item (like a puffer jacket) can be a great satchel candidate. But a small, heavy item (like a metal component at 4.8 kg) might technically fit the weight limit while not fitting physically. Measure first, buy second.
Hidden Costs, Mistakes, and When a Satchel Stops Making Sense
Most satchel regrets come from the same handful of avoidable errors.
The five most common mistakes:
Choosing one size too small – Forcing an item into a satchel that doesn’t fit can damage the packaging and may void transit protection.
Defaulting to Parcel Post when Express Post is needed – If your deadline is tight, the $3-$9 premium for Express Post is cheaper than a disappointed customer.
Sending fragile items in a poly satchel without padding – A satchel alone won’t protect a ceramic mug or a glass phone screen. Add bubble wrap or rigid inserts.
Assuming everything under 5 kg belongs in a satchel – Weight eligibility and physical fit are two different things. Oddly shaped items or fragile goods often need a box.
Ignoring dimensional limits – A satchel has fixed dimensions. If your item doesn’t fit when the satchel is sealed flat (with some expansion), it doesn’t fit.
Pre-lodgement checklist:
Item weight confirmed under 5 kg
Item dimensions checked against satchel size
Fragile items wrapped in cushioning before sealing
Label placed flat and fully visible
Correct service (Parcel Post or Express Post) chosen based on delivery deadline
Sender and recipient addresses complete with postcodes
For context on why these rules matter: some domestic parcel services have specific size and weight restrictions. Australia Post’s general domestic parcel limits allow up to 22 kg, 105 cm in length, and 0.25 cubic metres – but satchels operate within tighter constraints. Prepaid satchels are also single-use. The prepaid postage is embedded in the barcode on the satchel itself, so a used satchel can’t be relodged with a new label.
How to Buy, Pack, and Lodge a Post Satchel
Here’s the full process, start to finish:
Measure and weigh your item before choosing a size. Check the dimensions table above to confirm physical fit, not just weight compliance.
Select your service level – Parcel Post for standard delivery or Express Post for priority.
Buy the satchel from any Australia Post retail outlet or online at auspost.com.au. Bulk packs of 5 or 10 are available for repeat shippers.
Add protective cushioning for anything semi-fragile. Bubble wrap, tissue paper, or a rigid insert inside the satchel can prevent damage in transit.
Place the item inside and seal the satchel firmly along the adhesive strip. Don’t overfill – the satchel should close flat without bulging excessively.
Write or print the recipient address clearly on the front: full name, street address, suburb, state, and postcode.
Confirm the sender address is visible on the satchel as well.
Lodge it at any Australia Post outlet or street posting box. Express Post satchels should be lodged at a post office to catch the next service cutoff.
Can I reuse a prepaid satchel? No. The prepaid barcode is single-use. Once a satchel has been lodged and scanned, it can’t be reused for a new shipment, even if the packaging looks fine.
Do I need to print a label? No. Prepaid satchels include postage costs, with the barcode pre-printed on the packaging. Just write or print the delivery address directly on the satchel and you’re ready to lodge.
One practical note: handwritten addresses work, but printed labels reduce errors. If you’re a business shipping more than a few parcels a week, printed labels are worth the small effort.
Post Satchel Options for Small Businesses
If you’re shipping 50-500 parcels a year, the decision changes. Single satchels are fine for occasional senders, but recurring shippers need to think about unit economics and service fit.
When Australia Post satchels make sense for business: your parcel types are consistent (apparel, accessories, documents), your items fit neatly within satchel size tiers, your volume is low enough that bulk packs cover your needs, and your customers are comfortable with standard delivery windows.
When to look beyond satchels: item weights regularly push past 5 kg, package shapes need rigid boxes, your customers expect insurance beyond the standard $100 cover, or your shipping volume justifies negotiated rates through a courier platform.
| Option | Starting Cost | Weight/Size Flexibility | Tracking | Insurance Included | Account Required | Best For |
|---|---|---|---|---|---|---|
| Parcel Post Satchel | $10.05 | Up to 5 kg, fixed sizes | Yes | Up to $100 | No | Light, flat items, low volume |
| Express Post Satchel | $13.05 | Up to 5 kg, fixed sizes | Yes | Up to $100 | No | Urgent shipments, low volume |
| Courier via Aeros | From $4.90 | Up to 25 kg, flexible | Yes | Up to $500 | No | Mixed parcels, heavier items, price-sensitive volume |
For businesses that regularly ship heavier items, mixed parcel types, or need transparent pricing before committing, Aeros Couriers offers instant quotes from $4.90 for a box up to 25 kg. Insurance up to $500 per consignment is included, parcels get active monitoring, and there’s no account application or lock-in contract. That’s a useful alternative when a prepaid satchel doesn’t fit the item or the economics.
The same tracking experience available for other Australia Post services is included with satchels, but courier platforms often add proactive monitoring on top of standard tracking – something worth weighing if delivery reliability is part of your brand promise.
Australia Post also offers MyPost Business, which gives discounted rates for businesses spending $50+ over four weeks on domestic and international parcels. It’s worth comparing that against both prepaid satchels and courier quotes to find the best fit for your volume and parcel mix.
For frequent shippers using Aeros, every dollar spent on shipping earns reward points redeemable against future bookings or branded merchandise – a small perk that adds up across a year of consistent shipping.
The Bottom Line
A post satchel is the simplest way to send a light, flat item anywhere in Australia at a predictable cost. You know the price before you buy, packaging is included, tracking is built in, and you don’t need an account or a contract.
For most one-off senders and small e-commerce businesses shipping apparel, documents, or accessories, prepaid satchels are the right call. They’re cost-efficient up to 5 kg, available in five sizes, and work with both standard and express delivery.
The limitations are real, though. Items over 5 kg, fragile goods needing rigid protection, or parcels that don’t fit the fixed satchel dimensions all point toward a box or a courier booking. For businesses shipping at volume or with mixed parcel types, getting an instant quote from a courier platform like Aeros can save money and give you more flexibility than flat-rate packaging alone.
The right shipping choice depends on what you’re sending, how fast it needs to arrive, and how many parcels you move per month. This guide gives you the data to make that call in minutes, not hours.
FAQ
What is a post satchel?
A post satchel is a prepaid poly or padded envelope sold by Australia Post that includes both packaging and postage in one flat price. It’s used to send parcels up to 5 kg to any Australian address. It’s not a postal worker’s bag or a fashion item – it’s a mailing product for shipping goods.
How much does a post satchel cost in Australia?
On 1 July 2025, Australia Post increased Parcel Post postage prices by a weighted average of 1.95%. Current prices range from $10.05 (Extra Small) to $23.80 (Extra Large) for Parcel Post, and $13.05 to $32.30 for Express Post. Buying 10 or more satchels of the same size lowers the per-unit cost.
What size post satchel do I need?
Check the size table above and match your item’s packed dimensions to the right satchel. If you pack 5 kg or under in any of the small flat rate packaging, you’ll pay the small flat rate postage. Both weight (under 5 kg) and physical fit matter – measure your item before buying.
How long does a post satchel take to arrive?
Parcel Post delivers in 2-4 business days same state and 3-6 business days interstate. Express Post is faster at 1-2+ business days same state and 1-3+ interstate. Both are measured in business days and vary by origin and destination postcode.
What can I send in a post satchel?
Light, flexible, non-fragile items up to 5 kg work best: clothing, accessories, books, documents, and small electronics. Fragile goods need extra cushioning inside the satchel. Oddly shaped, bulky, or heavy items over 5 kg are better suited to a box or courier service.
Is a post satchel cheaper than a box?
For apparel, accessories, and other flat items, satchels usually win because packaging and postage are bundled. For fragile or oddly shaped goods, a box provides better protection even if it costs more. For items over 5 kg, a courier booking is often the right comparison, not a satchel.
Can I use a post satchel for Express Post or international shipping?
Yes for Express Post – dedicated Express Post prepaid satchels are available in all five sizes. International satchels are separate products with zone-based pricing. Up to 5% discount is available for five or more International Express satchels of the same size to the same zone. International Prepaid Satchels will now only be available for purchase in-store as of the July 2025 update.
