Unfortunately, there is no standardized industry specifications or measurements. However, the following rule-of-thumb, as it relates to chest size/width for adults and ages for youth, applies.

T-shirt Sizes	Width	Length	Comparable Clothing Size	Bust Size
Adult
Adult S	18"	27.5"	S	36-37
Adult M	20"	28.5"	M	38-39
Adult L	22"	29"	L	40-43
Adult XL	24"	30.5"	XL	44-48
Juniors
S	14"	19"	S or 1/2, 3/4	32-33
M	16"	22"	M or  5/6, 7/8	34-35
L	17"	22"	L or 9/10, 11/12	36-37
XL	17.5"	25"	XL or 13/14, 15/16	38-39
One Size	16"	22"	S,M or 1/2, 3/4, 5/6, 7/8	32-35
Youth
Youth XS	14.5"	19"	XS or 2/4	32-33
Youth S	16.5"	22.5"	S or 6/8	34-35
Youth M	18"	24.5"	M or 10/12	36-37
Youth L	20"	25.5"	L or 14/16	38-39

Note: Shirts can shrink up to one full size or more.

Care

Like all embellished garments, your t-shirt should be washed inside-out, in cold water, without bleach. This will provide maximum durability and colorfastness. Don't tumble dry (or dry clean); instead, hang to dry. After drying, if you must iron, iron on the reverse side only, and never over the image.