Tag guide
Find the serial on your shirt
Every manufacturer puts its product code somewhere different. Find your brand below, photograph that tag flat and in good light, and upload it with your submission — our AI reads the code and flags anything unusual before a human takes a look.
How to shoot the tag
- Turn the shirt inside out and lay the tag flat — no folds, no curl.
- Use daylight or a lamp from the side. Direct flash blows out printed codes.
- Fill the frame with the tag but keep all four edges visible.
- If the code is faded, take the photo anyway and add a note — we'll work with it.
Nike
Where to look
Inside the shirt on the lower-left hem (as worn), stitched into the side seam. Older shirts (pre-2010) have it at the back of the collar.
What the code looks like
A white or grey rectangular tag with a 6-digit style number, a dash and a 3-digit colour code, e.g. 894430-100. Vapor/Match shirts also print a longer alphanumeric code.
- →Turn the shirt inside out and flatten the tag before shooting.
- →Include the whole tag, not just the numbers — we compare tag layout too.
- →Nike Authentic/Player Issue shirts have an extra small tag with the size and country codes; photograph both if present.
adidas
Where to look
Inside the left side seam near the hem, or on the wash-care tag stack at the lower-left inside panel. Climacool/HEAT.RDY shirts often have it heat-pressed rather than stitched.
What the code looks like
A product code of two letters + four digits (e.g. GK9086 or FR8360) printed near the size and season. Vintage shirts show a longer numeric article number.
- →The heat-pressed codes fade — shoot in bright, even light with no flash glare.
- →Include the size box and the season printed under the code.
- →If there is a holographic authenticity sticker on the front, photograph it too.
PUMA
Where to look
Inside the lower-left hem seam, on the long wash-care ribbon. Some seasons place it at the back neck under the collar tag.
What the code looks like
A 6-digit style number followed by a 2-digit colour code, e.g. 765724 01, usually above the barcode.
- →The ribbon is long — fold it out flat so the full number is visible.
- →PUMA authentic shirts add a small square tag with the season code.
Kappa
Where to look
Inside the left hem seam, or on the neck tag stack. Kombat shirts carry a separate square hologram/serial label inside the hem.
What the code looks like
An article code such as 3021AB0 plus a colour code, and on Kombat shirts a printed serial with a hologram strip.
- →Kappa Kombat serials are the key check — photograph the hologram label straight on.
- →Shoot the neck tag as a second photo if the hem label is missing.
Umbro
Where to look
Inside the lower-left hem seam; older shirts use the back-of-neck tag.
What the code looks like
An alphanumeric style code (e.g. 92578U-J01) next to the size and country of manufacture.
- →Flatten the tag; Umbro ribbons curl and blur easily.
Macron
Where to look
Inside the left hem seam, on the printed care ribbon.
What the code looks like
A long numeric article code with a colour suffix, e.g. 58105123.
- →Include the Macron logo on the ribbon in the frame.
Castore
Where to look
Inside the left hem seam; some kits print the code on the inside back neck.
What the code looks like
A style code beginning with letters then digits, printed with the size and season.
- →Castore prints are low contrast — avoid shadows.
Hummel
Where to look
Inside the left hem seam on the care ribbon.
What the code looks like
A 6-digit article number followed by a 4-digit colour code, e.g. 210201-7026.
- →Include the barcode beneath the number if there is one.
New Balance
Where to look
Inside the left hem seam, sometimes heat-pressed inside the back neck.
What the code looks like
A code like MT031234 or a season/style block printed with the size.
- →Heat-pressed codes crack with age — get as close as your camera will focus.
Joma
Where to look
Inside the left hem seam or back neck tag stack.
What the code looks like
A reference number such as 101476.907 printed with size and composition.
- →Photograph the full ribbon including the reference and colour digits.
Le Coq Sportif
Where to look
Inside the left hem seam.
What the code looks like
A long numeric article code, often starting with the season year.
- →Include the season year printed beside the code.
Erreà
Where to look
Inside the left hem seam on the woven care label.
What the code looks like
An article name plus numeric code, printed above the size.
- →Woven labels are dark — use side lighting, not flash.
Jako
Where to look
Inside the left hem seam.
What the code looks like
A 4-digit article number with a 2-digit colour code, e.g. 4204-10.
- →Include the size box beside the code.
Lotto
Where to look
Inside the left hem seam or the back neck tag.
What the code looks like
A code such as R0123 or a longer numeric article reference.
- →Older Lotto shirts only have a neck tag — shoot that instead.
Diadora
Where to look
Inside the left hem seam; 90s shirts use the back neck tag.
What the code looks like
A numeric article code printed with the country of manufacture.
- →Vintage tags are fragile — lay the shirt flat, do not stretch the label.
Mizuno
Where to look
Inside the left hem seam.
What the code looks like
A code such as P2GA1234 printed above the size.
- →Include the full code, including trailing digits.
Under Armour
Where to look
Heat-pressed inside the back neck, or on the left hem ribbon.
What the code looks like
A 7-digit style number with a 3-digit colour code, e.g. 1234567-001.
- →Neck transfers rub off — shoot straight on and steady.
Craft
Where to look
Inside the left hem seam.
What the code looks like
A 7-digit article number, e.g. 1906234.
- →Include the size and season if printed.
Other / not listed
Where to look
Check three places in order: the inside of the lower-left hem seam, the inside back neck, and the inside of the right hem seam.
What the code looks like
Any printed or woven label carrying a style/article/product code alongside the size and fabric composition.
- →Photograph every label you find — more photos always help.
- →Add the brand name in the notes field so we know what we're looking at.