Measure first: caps, a chain by length, and the shoe and trouser shelves
Items sold by a number that belongs to you: head round, neck, waist, foot. Measure yourself before you open the menu. The shoe and trouser shelves are link-only for now, and the cards below say why.
A size row on uidbuy.com, from the official guide video at 0:56.
Everything in this band is chosen by a number of yours: a head round in centimetres for caps, a neck length for a chain, a waist for a belt or jeans, a foot for shoes. A seller's EU 42 or 31 waist is a starting point; the centimetres in the chart are the answer.
Measure with a soft tape before opening the menu, then ask the warehouse for one measured shot to confirm. Socks and underwear cannot be returned under UIDBuy's standard rules; caps, chains, shoes and trousers can, within the 120 hours, if the seller offers it.
Every card has two links: the catalog page with all photos and the option menu, and the same item on uidbuy.com. The warehouse photo guide explains the brief in more depth.
Caps and a beanie sized by head round
Embroidered six-panel cap in twelve colours
Measure firstCN¥46.00, shown as US$7.73 on uidbuy.com, read 23 Oct 2026
Why it made the cut
A plain cap with a small city-name embroidery, and twelve colours from pale yellow to wine red. Cheap enough to fill the last few grams of a parcel without changing the shipping bill much.
Photos to open
Front shot for the embroidery. The side-or-logo angle usually catches the strap at the back; if it does not, ask for it, since that is where you see whether the cap really adjusts.
Size note
Listed as 均码55-60, which uidbuy.com translates as average size 55-60: a head circumference of 55 to 60 cm. Measure round your forehead before ordering if you usually struggle with caps.
Measure firstCN¥43.00, shown as US$7.22 on uidbuy.com, read 23 Oct 2026
Why it made the cut
A garment-washed cap with an unstructured front and a small word stitched across it, in seven muted colours. It is the cheapest item on the site, which makes it a sensible add-on.
Photos to open
Washed caps vary from one batch to the next. Look at the front shot for the fade and compare it with listing photo one before you accept it.
Size note
The menu says 可调节, adjustable, with no range. Soft crowns fit a wider range of heads than stiff ones, but ask for the strap length in a close-up if you need more than 58 cm.
Measure firstCN¥70.00, shown as US$11.76 on uidbuy.com, read 23 Oct 2026
Why it made the cut
A thick rib beanie in off-white, army green and black. It made the list for one reason above the others: the seller writes the size as L (58-60cm), with the numbers, which is exactly what we want from a menu.
Photos to open
The front shot shows the rib depth; the tab should sit straight. Knitwear can arrive with loose yarn ends, which UIDBuy counts as a seller matter, so check the fold edge.
Size note
L, 58 to 60 cm head, the only menu option. Measure round your head at the brow line and compare.
The best sellers on this shelf were monogram belts with famous initials on the buckle. The one plain listing near the top turned out to be studded dog collars that had been filed under belts, which is a fair warning about how shelves get filled. The tile photo shows plain leather straps; pick from the shelf, and ask for a close-up of the buckle before you pay.
We read the sneaker shelf to the bottom of its best sellers and beyond. Every pair carried a sports or fashion maker's mark, often only in the Chinese title or on the sole. If you shop it anyway, the sizing advice holds: measure your own insole in millimetres and ask the seller for theirs.
The jeans shelf is dominated by famous denim names and patch logos; the pairs with plain titles showed logo crosses or brand patches in their photos. Jeans are sold by waist in centimetres or in chi (one chi is about 33.3 cm), so measure a pair you own laid flat.
Wide-leg sweatpants with a curved seam, sold apart from the hoodie
Measure firstCN¥102.90, shown as US$17.28 on uidbuy.com, read 23 Oct 2026
Why it made the cut
Red or navy wide-leg sweatpants with a curved panel seam and drawcord hems. The listing photo shows a matching hoodie, and the menu is honest about it: red hoodie, navy hoodie, red trousers and navy trousers are four separate options. Pick the trousers and you get trousers.
Photos to open
Ask for the hem with the drawcord pulled out, and one of the waist, flat, with a tape measure across.
Size note
S to XL. With a wide leg, the length line matters more than the waist: measure a pair you own from waistband to hem and compare. Read the option name twice before paying, so you do not end up with the hoodie.
Measure firstCN¥95.33, shown as US$16.01 on uidbuy.com, read 23 Oct 2026
Why it made the cut
Black or grey straight-leg track pants with a thin stripe down each side. The seller's Chinese title calls them nine-tenths length, so they are cut to end above the ankle, which is the detail most buyers would miss.
Photos to open
A side shot shows whether the stripe runs straight down the seam. Ask for a measured inseam, since the cropped length is deliberate.
Size note
S to XL, two colours named in words. If you want full length, size by inseam rather than waist; a cropped cut on a tall wearer ends well above the shoe.
Measure firstCN¥658.00, shown as US$110.48 on uidbuy.com, read 23 Oct 2026
Why it made the cut
The priciest pick, here because it is the best example of reading a menu properly. Hearts set with square cubic zirconia (the Chinese title says 锆石) form a heavy curb chain in gold, silver or rose gold with silver.
Photos to open
At this price, spend CN¥3: the clasp, the back of one heart, and the chain on a ruler. Pay attention to the length you chose, because the menu labels lengths in an odd place.
Size note
Lengths sit under a menu heading that reads 纯度, purity: 16, 18, 20 and 22 inches, given as 40, 45, 50 and 55 cm. The menu price runs from CN¥658 to CN¥848 depending on the option.
