17.5 I never train my calves either. when i started working out more seriously at 120 pound bodyweight my legs were such twigs i couldn't even squat 80 pounds but my calves were 15 inches. even when i was 6 years old my grandfather used to talk about my calves. Now I dont know what my thighs are. They are either 25.5 when i measure with the tape very high or 23.5 with the tape mid-thigh.