InPost Locker Sizes for Vinted Sellers

InPost publishes the sizes on its locker-sizes page and they are the same at every UK locker. Small (A) is 8 cm deep, 38 cm wide and 64 cm high. Medium (B) is 19 cm deep with the same width and height. Large (C) is 41 cm deep, again 38 × 64 cm. The biggest parcel the network accepts is therefore 41 × 38 × 64 cm, and the weight limit is 15 kg for every size, including marketplace parcels handed in at an InPost Shop. InPost's sizes page also lists an Extra Small slot (4 × 23 × 40 cm) at some newer lockers for envelopes and cards; it is not everywhere, so do not plan around it.

Because width and height never change, the only measurement that decides whether the door closes is depth. A parcel 30 cm wide and 50 cm tall is fine in any compartment; the question is whether it is under 8, 19 or 41 cm thick once packed and taped.

From the parcels we send: a single T-shirt, a slim book, a phone case, jewellery or a pair of socks packs to 3 to 5 cm in a mailing bag and goes in a Small. A pair of jeans folded into thirds is 5 to 7 cm, so one pair fits a Small and two pairs need a Medium. Jumpers, hoodies, dresses and shoes without their box are Medium territory at 10 to 18 cm. Coats, boots, trainers in the original box, handbags, bundles and small homeware need a Large.

The borderline cases are the ones that fail. A thick knit that measures 20 cm because you folded it in half rather than in thirds; a shoe box whose lid adds 2 cm; a bundle of five items that a Medium would have taken if the bag had been pressed flat. When a measurement is within a centimetre of the limit, treat it as the next size up or repack.

• Small (8 cm): T-shirts, vests, leggings, scarves, phone cases, jewellery, slim paperbacks, trading cards in a mailer
• Medium (19 cm): jeans, jumpers, hoodies, dresses, skirts, shoes without the box, two or three light items
• Large (41 cm): coats, puffer jackets, boots, boxed trainers, handbags, bundles, small homeware, hardback book sets

A rigid box keeps its full depth however you handle it. A polythene mailing bag does not: fold the garment flat, press the air out before you seal it and the parcel settles into a smaller compartment than the same item in a box. A vacuum bag halves the volume of a puffer jacket. Bubble wrap adds depth, which is the one thing you do not want, so keep it for anything structured or fragile and skip it for clothing.

Measure at home with a tape or by standing the packed parcel against a ruler, and measure the thickest point, not the edge. If the number is 8, 19 or 41 cm exactly, it will not close.

Vinted does not let you choose the courier: the buyer picks it at checkout from the carriers you have enabled, and InPost is offered only in Vinted's standard tier of up to 2 kg. The size category you chose when listing drives the postage the buyer pays. None of that fixes the compartment, which you choose on the locker screen when you arrive. If the door will not close, tap 'My parcel doesn't fit', pick a bigger size if one is free and try again; for Vinted and eBay labels a bigger compartment costs nothing extra. Only labels bought directly in the InPost app are fixed to a size.

Lockers are emptied at least once a day, and Large compartments go first in town centres, so check the InPost app for live availability before you leave; supermarket car-park lockers have the most Large slots.

On Vinted the buyer pays the postage at a price Vinted sets per carrier and size tier, shown only at checkout. InPost is usually the cheapest carrier the buyer is offered because its own network is the cheapest: sending direct through the InPost app costs £1.99 for a Small, £2.59 for a Medium and £3.99 for a Large to another locker or shop (£2.89, £3.99 and £5.99 to a home address), against £2.62 for Evri to a ParcelShop and £3.75 for Royal Mail Tracked 48 Small Parcel since 5 October 2026. Packing flat therefore matters twice: it decides which compartment will take the parcel, and if you ever send direct it decides the price.

A buyer takes a hoodie and a pair of jeans as a bundle and chooses InPost. Folded in half in a box they measure 24 cm deep, which means a Large compartment and a hunt for a locker with one free. Folded into thirds and sealed in a 35 × 45 cm mailing bag with the air pressed out, the same two items measure 14 cm, which is a Medium. At the Aldi locker that evening the InPost app shows one Large and six Mediums free, so the repack is the difference between a two-minute drop-off and a second trip.