Categories
Every category fails in its own particular way
The advice "check the size chart" is useless because it is the same advice for everything. What actually helps is knowing what specifically goes wrong in the category you are about to buy from, because it is different for shoes than it is for bags.
The list below is ordinary retail categories on our listing site. Each one links to a page we have tested, and each carries the one failure that catches people out at the moment they pick an option.
The eight people start with
The marker under each icon is our own three step read on how easily that category is picked wrong at the listing page. It is a judgement, not a measurement.
Sneakers
More versions under one listing than any other category, and the size charts differ from seller to seller.
Browse this categoryCategoryCasual shoes
Often listed by a length in centimetres rather than a size number, which is better information than most charts give.
Browse this categoryCategoryLeather shoes
Colour names carry the most weight here and photographs the least, because leather photographs badly under shop lighting.
Browse this categoryCategorySandals
Men and women versions of one design usually share a listing and differ only in the option name.
Browse this categoryCategoryHoodies
Fleece lined and unlined versions share a listing, a price band and often the same photographs.
Browse this categoryCategoryT-shirts
The category where a size chart matters most and is published least, because the fit is the whole product.
Browse this categoryCategoryShirts
Sleeve length and collar type live in the option name rather than the title.
Browse this categoryCategoryJackets
Season matters. The same model is sold in a light and a padded version under one set of pictures.
Browse this categoryAll twenty six, with the trap named
Every link here returned a live page when we checked it on 2026-08-04.
| Category | What goes wrong at the choosing step |
|---|---|
| Sneakers | More versions under one listing than any other category, and the size charts differ from seller to seller. |
| Casual shoes | Often listed by a length in centimetres rather than a size number, which is better information than most charts give. |
| Leather shoes | Colour names carry the most weight here and photographs the least, because leather photographs badly under shop lighting. |
| Sandals | Men and women versions of one design usually share a listing and differ only in the option name. |
| Hoodies | Fleece lined and unlined versions share a listing, a price band and often the same photographs. |
| T-shirts | The category where a size chart matters most and is published least, because the fit is the whole product. |
| Shirts | Sleeve length and collar type live in the option name rather than the title. |
| Jackets | Season matters. The same model is sold in a light and a padded version under one set of pictures. |
| Down jackets | Fill weight is rarely published, and it is the number that decides whether the coat is warm. |
| Jeans | Waist measurements are given in centimetres more often than in inches, and the two get mixed up in translation. |
| Sweatpants | Length is the failure mode. Chinese sizing runs shorter in the leg for the same waist. |
| Shorts | Cheap to buy, heavy for their price in freight terms. Worth consolidating. |
| Sweaters | Photographs are usually styled, so the fit you see is not the fit you get. |
| Bags | Thumbnails are small and hardware finish is the difference between two versions. Reference picture territory. |
| Backpacks | Capacity in litres is often missing. Compare the dimensions instead. |
| Shoulder bags | Strap length and drop are almost never listed, and they decide whether you will wear it. |
| Wallets | Small, light and easy to add to an existing parcel without changing the freight much. |
| Belts | Sold by total length, not by waist size. Measure a belt you own first. |
| Watches | Movement type is the thing that separates two versions and the thing least likely to be written down. |
| Eyewear | Lens colour and frame colour are separate options, and they get confused in the thumbnails. |
| Jewelry | Plating and base metal are usually only described in the seller notes, if at all. |
| Hats | One size dominates, so the risk moves from fit to colour accuracy. |
| Electronics | Plug standard and voltage are the real variants. Check before, not after. |
| Headphones | Model numbers survive translation better than anything else in this list. Use them. |
| Perfume | Volume in millilitres is the option. Restrictions on what can fly apply here more than anywhere else. |
| Plush toys | Size in centimetres varies enormously under one listing, and the photograph never shows scale. |
Two categories that behave differently from the rest
Electronics. The variant that matters is not colour or size, it is the plug standard and the voltage. Those are frequently in the option name and almost never in the translated title. Read the option, not the heading.
Perfume and anything pressurised or liquid. The restriction is not on the listing at all. Which services will carry it is decided when you submit the parcel, and the official guide notes that some items are restricted to certain delivery types. Deciding to buy it and deciding how it flies are two separate moments.
How to read this list without overthinking it
Three markers, one sentence each.
Hard to get wrong
Hats, socks, keychains, plush toys. One size or no size, and the photograph tells you most of it. Buy these first if you are testing an agent for the first time.
Read the option names
Hoodies, backpacks, perfume, jewelry. Usually one attribute decides it, and that attribute is written in the option rather than the title.
Ask something before you pay
Sneakers, jeans, watches, bags, eyewear. Either the versions differ in ways a photograph hides, or the sizing is published thinly. This is where the message box earns its keep.
Something else entirely
Our catalogue has 65 categories and this page names 26 of them. If yours is missing, the general rule still holds: find the one attribute that decides it, then check whether the listing publishes that attribute.