Great boots! I took my time reading the measurements and reviews for these boots and am so happy that I made this purchase. This is truely a thigh-high, snug-fit low block heeled boot. Stays up without double-sided tape, and is very stretchy. I am 5'7, 170 pounds, and the top of the boots were about 4 inches above my knee, a few centimeters shorter when I sat or walked. The 18 inch calf was perfect for my wider calves, but were not baggy on my ankles or thighs which I was worried about. I will be purchasing these again!