I agree like I said I'm all tri's no peak I'm nearly 16" with my arms down at my sides, my friend can get 18" on a pump he's slightly bigger than me bout 10lbs but until we flex we look almost the same size arms..how long have you been lifting? I feel like at 17" my arms would look good size even at 215lbs because I started out so slim I can hold weight at slow bf% perty well