The average arm muscle size for a 18 year old male is 14 to 15 inches. The more you work out/lift weights, the more your muscle size will improve.
120
125
im 160lbs :)
115 to 125 pounds
110-125lbs
180-210
For an 18-20 year old girl the average weight is 125 - 130 lbs.
170-180 ponds
18 kellogram
125 lbs
100 POUNDS ! It's Nafisa Baret \
11111111 kilos