Note: Hand, wrist, mid arm and upper arm sizes are independent of each other and can be mixed and matched (like a Choose Your Own adventure story!), depending on your unique and beautiful shape.

Hand (measured around the knuckles, below the base of the fingers, not including the thumb): 6 (6.5, 7, 7.5, 8)”/15.2 (16.5, 18.0, 19.0, 20.5) cm

Thumb Gusset (measured as difference between hand measurement and circumference of hand including thumb): 1 (1.5)”/2.5 (3.8) cm

Wrist: 5 (5.5, 6, 6.5, 7)”/12.5 (14.0, 15.0, 16.5, 18.0) cm

Mid arm (measured roughly 1”/2.5 cm below the elbow): 7.5 (8, 9, 10, 11, 12)”/19.0 (20.5, 23.0, 25.5, 28.0, 30.5) cm

Upper arm: 9.25 (9.5, 10, 11, 12, 13.5, 15.5)”/23.5 (24.0, 25.5, 28, 30.5, 34.5, 39.5)cm

Errata:
Fixed in new version.