How it works: every listing has a packed weight. When a buyer wins more items, their weights are added together and the bundle moves up to the next shipping band, until it reaches the maximum parcel weight you set. Items marked Ship separately always get their own label.

This is the only step every seller needs to do. In the Seller Portal, go to Settings → Shipping and choose your Maximum parcel weight from the weight bands shown. Pick the heaviest parcel you can realistically pack, and make sure you have the packing materials to match.

For example, if you choose a 0–5 kg band, a buyer's bundle keeps growing as they add items, and the label upgrades with it. Parcels over 5 kg won't be offered. Heavier one-off items can still be sold: see Large items below.

If you use Snap listings, you're all set: AI works out the weight of each item for you.

You set the weight yourself. Create or edit the listings you run so they reflect the approximate packed weight and size. In the listing, under Shipping, click Edit, then pick the Package size and enter the Packed weight (item and packaging).

Mixed baskets work too: for example, 4 medium (4 kg) + 2 small (1 kg) = 5 kg, in one parcel.

Package size can't be changed after a sale. If you use pre-listings or generic listings, it's your responsibility to set the right size and weight, to avoid chargebacks.

For items you want shipped on their own label, typically large or bulky items heavier than your maximum parcel weight, create a separate listing and turn on Ship separately in the listing's shipping.

You can then set the packed weight above your maximum parcel weight, for example 15 kg. Whenever this listing runs, it always gets its own label and is never bundled with the buyer's other orders.