Two Circles Size Chart

Mens
Chest  Waist
XS 35 in 29 in
S 36 in 31-32 in
M 37-38 in 33-34 in
L 39 in 35 in
Womens
Waist UK Dress size
XS 26 in 6-8
S 27-28 in 8-10
M 28-29 in 10-12
L 30-31 in 12-14
Arm Warmers
Compare to a pair you already own if possible.
XXS XS  S M L XL
A 4.3 in 4.7 in 4.9 in 5.3 in 5.5 in 5.7 in 
B 15.7 in 17.1 in 17.9 in 18.7 in 19 in 19.2 in
C 2.7 in 3.1 in 3.3 in 3.5 in 3.7 in 3.9 in