Question: what is the average size of wrist?
Answer: Extra Small (XS) ~ fits 6.5 inches or 16.51 centimeters = This is the average of a small woman's wrist. Small (S) ~ fits 7 inches or 17.78 centimeters = This is the average size of a woman's wrist. Medium (M)~ fits 8 inches or 20.32 centimeters = This is the average man's, or a woman with a large wrist.