All t-shirts are 100% Cotton unless Heather Blend, Heather contains 90% Cotton/ 10% Polyester.  Printed in the USA.
 
Chest SizeInchesCentimetersXS (6-7)  26"-28"66-71
S (8)      28"-30"71-76
M (10-12)30"-32"76-81
L (14-16)32"-34"81-86