We get T Shirts from dozens of different distributors and the designs are printed on a number of different brands of shirt. They are all industry standard sized, and even though they say pre-shrunk, all shirts will shrink a little after being washed. The approximate measurements of the shirts (widthxlength) are: YS- 14 1/2"x18", YM- 15 1/2"x20", YL- 16"x21", S- 17"x22", M- 18"x24", L- 21"x25", XL- 23"x26".