The fabric is 100% cotton for solid colors. Polyester is included for heather-color variants. 
 
XS
S
M
L
XL
Width, in
16.14
16.93
18.11
18.90
20.08
Length, in
20.47
22.05
23.62
25.20
26.38
Sleeve length (from center back), in
13.39
14.17
15.35
16.14
17.32
 
.: Made with 100% US cotton.
.: All t-shirts come with pearlized, tear-away labels for total comfort and a scratch-free experience.
.: Made using US cotton.
.: Fabric blends: Heather colors - 50% cotton, 50% polyester, Sport Grey - 90% cotton, 10% polyester.