It depends on your measurements. Are you talking about inches, or centimeters, and it also depends on the size and age of the person. What would be large for a 4 year old would be small for a 34 year old.
1 inches
Georgr St Pierre's biceps are 15 inch's around
21
Massive
21 inches
16.5 inches
10 inches
56 yo
Triple h has big biceps. its biceps size is 32 inches. he has his name in guineas world records 2001.he is also known as big biceps(trippie). he also defeat khali in arm wrestling who,s biceps size is 30 inches. only 2 inches less. if you have more size in biceps than you will win
P90X trust me it works
the weight lifting machines
bring the gym to you.