Note: This is US size, you may choose the size as you normal wear. But please check the size range "no more than" first. Size Range is for reference only, eg.
One man he can wear size L and size XL, size L is just tight and size XL is fit or little loose.
Refer to the Size Chart below the description.
2T ( KID ) 15" body length x 10" chest S ( Adult ) 27" body length x 18" chest
3T ( KID ) 16" body length x 11" chest M ( Adult ) 29" body length x 20" chest
4T ( KID ) 17" body length x 12" chest L ( Adult ) 31" body length x 22" chest
XS ( KID ) 18" body length x 12" chest XL ( Adult ) 32" body length x 24" chest
S ( KID ) 20" body length x 14" chest 2XL ( Adult ) 33" body length x 26" chest
M ( KID ) 22" body length x 16" chest 3XL ( Adult )34" body length x 28" chest
L ( KID ) 24" body length x 18" chest
XL ( KID ) 26" body length x 19" chest