Apparel might be larger in size than typically expected. It could be beneficial to opt for a size smaller than you normally would.
 
NOW Courier logo affixed. 

Features: matching flat-knit collar, four-button narrow placket for feminine look, side slits;
Material: 4.1 oz/yd² / 139 gsm, 100% polyester piqué with moisure-wicking, anti-microbial and UV protection performance.
 
Size Chart:
How to measure chest: Measure just under the arms, across the fullest part of the chest, around shoulder blades, holding measuring tape firm and level
 
S: 33-35" chest
M: 36-38" chest
L: 39-42" chest
XL: 43-45" chest
2XL: 46-49" chest
3XL: 50-53" chest