T-shirt sizes can vary from brand to brand 'cause every label uses different kinds of shirts (AAA, Gildan, Anvil, Hanes, American Apparel, etc). Also, due to the way t-shirts are made, tee sizes can even vary within a brand (i.e. not all Gildan XLs are always gonna fit exactly the same). This is due to tees being a knit weave, the material stretching, different lots, material quality, cutting, and a bunch of other boring reasons, etc etc. The charts below should help you figure out your size, but keep in mind that because of these reasons, not everything will be perfectly accurate.
BRANDS: 10.Deep, Acapulco Gold, Fuct, Undefeated *
*These styles are more "fitted". Usually printed on American Apparel or similar – thin and soft. If you like your shirts fitted, order your usual size. For some room, order a size up from your usual.
BRANDS: Another Enemy, Benny Gold, FreWil, HUF, The Hundreds, Hellz Bellz, Krudmart, Piko 1988, PRBLM CHLD, Quiet Life, Superb **
**Fit is considered "regular" – slightly thicker and larger than above. We suggest ordering your usual size for the best fit.
BRANDS: Black Scale, Rocksmith Tokyo, UNDRCRWN***
***Fit is "regular" to "slightly large". We suggest ordering your usual size for the best fit.
APC Jeans Sizing Chart: