Best way to assess sizing: Grab your current favorite Tee from your closet and measure the width at one inch below the armpit. Check the size chart below and make your decision. 

Unisex Lightweight Tee: 

Inches Width Length
XS 16.5 27
S 18 28
M 20 29
L 22 30
XL 24 31
2XL 26 32
3XL 28 33

LS TRIBLEND Hoodie Tee: 

Inches Width Length
S 18 28
M 20 29
L 22 30
XL 24 31
2XL 26 32
3XL 28 33

Unisex LS Hoodie Tee: 

Inches Width Length
XS 16.5 27
S 18 28
M 19.5 29
L 21 30
XL 22.5 31
2XL 24.5 32

Unisex Sweatshirt Hoodie: 

Inches Width Length
S 20 26
M 22 27
L 24 28
XL 26 29
2XL 28 30
3XL 29 32
4XL 32 33
5XL 34 34