Shipping costs quietly eat into reseller profit.
This is especially true if you sell on eBay, Depop, or both. A few dollars extra on one order may not feel like much, but across dozens of parcels it can make a real difference.
If you are preparing a Depop order specifically, start with the current Depop shipping Australia guide. It explains when to use a Depop label, how to add tracking when arranging postage yourself and why the sale-receipt address matters.
One of the easiest mistakes Australian resellers make is choosing postage based only on the size of the bag instead of the weight, shape and protection needs of the item.
Australia Post flat-rate satchels can be useful. If your item fits in eligible flat-rate packaging, postage is based on the packaging size. That can be great for heavy compact items.
But for lightweight bulky items, like plush toys, jackets, soft bags, costumes or puffer vests, the better option may be to use a larger mailer physically while selecting an own packaging option in the label flow.
Last updated: 7 July 2026. Australia Post rates and rules can change, and some example graphics use 2025 price points to show the comparison pattern. Always check the current Australia Post calculator or your label provider before buying postage.
The common mistake: choosing the satchel size just because the item fits
Imagine you sell a plush toy.
It is too bulky to fit in an Extra Small satchel. It may need a Large or Extra Large bag because of its shape.
But the plush only weighs 250g.
A common mistake would be to choose the Large or Extra Large flat-rate option just because that is the physical bag size being used.
That can mean paying more than you need to.
Instead, if the item is soft, lightweight and safely packed, compare the flat-rate satchel option against own packaging. Enter the real packed weight and dimensions, then choose the cheapest valid option available to you.
That is how a large bagged item can sometimes avoid the large flat-rate price.
What own packaging actually means
The phrase “own packaging” can be confusing.
It does not always mean the bag has to be plain or bought somewhere else. In many label flows, own packaging is the name of a postage option. It is separate from the physical bag or mailer you use to protect the item.
That means the two decisions are:
- What packaging safely holds the item?
- Which valid postage option is cheapest for that packed parcel?
The physical bag and the label option are related, but they are not always the same thing.
The important part is accuracy. Do not guess the weight. Do not ignore dimensions when the label flow asks for them. Do not choose an option the parcel does not qualify for.
When own packaging may beat the satchel size
For lightweight bulky items, it can be worth comparing the flat-rate satchel option against own packaging. This is especially useful when an item needs a larger bag because of its shape but does not weigh very much.
The pattern is simple:
- if the item is heavy for the bag size, flat rate may win
- if the item is light for the bag size, own packaging may win
- if the weight band and bag size line up, the price may be similar
| Physical bag or satchel used | 250g item | 500g item | 1kg item |
|---|---|---|---|
| Extra Small | Same price | Extra Small flat rate may be cheaper | Extra Small flat rate may be cheaper |
| Small | Own packaging may be cheaper | Same price | Small flat rate may be cheaper |
| Medium | Own packaging may be cheaper | Own packaging may be cheaper | Same price |
| Large | Own packaging may be cheaper | Own packaging may be cheaper | Own packaging may be cheaper |
| Extra Large | Own packaging may be cheaper | Own packaging may be cheaper | Own packaging may be cheaper |
This table shows the pattern resellers should watch for: a large physical bag does not always mean the large flat-rate option is the cheapest valid postage choice.
Always enter the real packed weight and dimensions. This is not about under-declaring postage. The saving comes from choosing the correct valid postage option for the item.
How to compare options before sending
The steps are usually the same whether you buy postage through eBay, MyPost Business, Australia Post or another label flow:
- Pack the item safely.
- Weigh the parcel after packing.
- Measure the parcel if the label flow asks for dimensions.
- Compare flat-rate satchel options against own packaging.
- Choose the cheapest valid option.
Do not use the item weight from the listing as your postage weight. Packaging adds weight.
A shirt might weigh 470g on its own, but once you add a satchel, label, tape and a thank-you card, it may go over 500g. That can move it into the next postage band.
A small digital scale is one of the best tools a reseller can buy.
Flat-rate satchels are still useful
Flat-rate satchels are not bad. They can be very useful.
They tend to work best when the item is heavy but compact. For example:
- a bundle of jeans that fits in a Small or Medium satchel
- a heavy jacket that compresses into eligible packaging
- a dense clothing bundle
- a compact item that would otherwise cost more by weight
In those cases, flat-rate packaging may be a good deal because the parcel can be relatively heavy while still fitting the satchel.
The problem happens when sellers apply the same logic to light bulky items.
A 250g plush toy and a 4kg clothing bundle are very different parcels. They should not automatically be treated the same just because they need a similar-sized bag.
The simple reseller rule
Use this rule when packing orders:
If the item is heavy for its size, check flat-rate packaging. If the item is large but light, check own packaging.
This is especially useful for resellers who sell clothing, toys, plush, costumes, shoes, bags and mixed second-hand items.
Good items for bag-based shipping
Soft lightweight items are often good candidates for bag-based shipping.
Examples include:
- plush toys
- puffer jackets
- hoodies
- soft handbags
- costumes
- scarves
- light clothing bundles
- fabric items
- kids’ dress-ups
These items may look large but often weigh very little.
A box can make them more expensive because it adds structure, size and sometimes unnecessary cubic weight. A bag keeps the parcel flexible and avoids paying for empty space.
When a box is still better
A bag is not always the right choice.
Use a box when the item needs protection. Examples include:
- shoes that may be crushed
- fragile collectibles
- boxed toys
- electronics
- ceramics
- glassware
- hats that need to hold their shape
- anything that could be damaged in a soft satchel
The goal is not to use the cheapest packaging at all costs.
The goal is to use the cheapest safe packaging.
A damaged item, refund or return will cost more than the postage saving.
Watch out for cubic weight
Cubic weight is where large boxes can become expensive.
A parcel might not weigh much on the scale, but if the box is large, the postage system may calculate a higher chargeable weight based on the parcel’s dimensions.
This is why soft items should usually not go into oversized boxes unless they need the protection.
For example, a light plush toy in a big box may cost more than the same plush toy in a large soft mailing bag.
The item did not change. The packaging did.
Australia Post explains cubic weight separately, and sellers should check that guidance for larger, heavier or unusually shaped parcels.
Build your shipping around common weight points
For many Australian resellers, the most useful weight points to watch are:
- up to 250g
- up to 500g
- up to 1kg
- flat-rate packaging limits where eligible
These points help you decide whether an item should be listed with a cheaper postage option or whether you need to build more shipping cost into the price.
If you sell a lot of clothing, plush toys or accessories, it is worth learning what your common items weigh after packing.
Suggested reseller workflow
Before listing an item, ask:
- Is this item soft or fragile?
- Can it safely go in a bag?
- What will it weigh after packing?
- Does it need a box?
- If it needs a large bag but weighs very little, should I compare own packaging?
- If it is heavy but fits in a smaller satchel, should I use flat-rate packaging?
This quick check can stop you from overcharging buyers or undercharging yourself.
Why this matters for eBay and Depop sellers
Postage can affect whether someone buys your item.
A buyer may happily pay $25 for a plush toy but hesitate if the postage looks too high. If you can safely reduce postage by choosing the right packaging option, your listings may become more attractive without lowering the item price.
This matters even more when cross-listing between eBay and Depop.
Different buyers may have different expectations around postage. Clothing and plush buyers on Depop may be especially sensitive to shipping cost, while eBay buyers may compare total price across multiple similar listings.
Better shipping choices can make your listings more competitive.
If you already sell on eBay and want to test Depop, Listalong is built to help Australian resellers reuse suitable eBay listings on Depop, then keep sold items from staying live on the other platform.
The main takeaway
Do not choose postage only by the size of the bag.
Choose postage based on the item’s weight, shape, protection needs and the valid options available in the label flow.
A heavy compact item may be perfect for flat-rate packaging.
A lightweight bulky item may be cheaper in a large soft mailer entered as own packaging.
That is the reseller shipping lesson:
Big does not always mean expensive. Heavy matters. Shape matters. Packaging choice matters.
Before sending your next plush toy, jacket or soft bulky item, compare the flat-rate satchel price against own packaging.
You may find that the large bagged item does not need the large postage price.
FAQ
Is own packaging cheaper than Australia Post flat-rate satchels?
Sometimes. Own packaging may be cheaper for lightweight bulky items that need a larger bag but do not weigh much. Flat-rate satchels may be better for heavier compact items that fit inside eligible packaging.
Can I use a large mailer or bag but choose own packaging?
In many postage flows, the physical packaging and the postage option are separate choices. The important thing is to enter the real packed weight and dimensions, then compare the valid options available to you.
When are flat-rate satchels best for resellers?
Flat-rate satchels are often useful when an item is heavy for its size and fits inside eligible flat-rate packaging. They can be less useful for lightweight bulky items where the large bag size does not reflect the parcel weight.
Should I use a bag or a box for clothing and plush toys?
Soft, lightweight items such as clothing, plush toys and fabric items may suit bag-based shipping. Fragile, crushable or structured items should be boxed if they need protection.
Why does shipping choice matter for eBay and Depop sellers?
Postage affects the total price a buyer sees. Choosing the right safe postage option can make a listing more competitive without lowering the item price.
Useful next reads
- Postage and reseller tools
- Free eBay to Depop cross-lister Australia
- How to sell on eBay and Depop at the same time
- eBay vs Depop fee calculator