My biceps are huge over 42 cm (over 16'5'') and growing!!! To get this size I need to train with very heavy weights....like SUV Tyre which are massive and heavy! I curl with my both hands (each hand at the time) the Tyre several times!!! and lift it over head as well. You can watch my incredible strength and huge biceps on this video...not a video you will see every day!!! Pure Power and Woman Strength!!!