Features JF Form Foam - Twice the thickness of a standard foam insole, with optimal rebound so the sole never flattens and you always feel supported. Material: Faux Leather Heel Height: 2.25" Shaft Height (based on size 8): 14.0" Regular Calf Circumference (based on size 8): 16.5" Wide Calf Circumference (based on size 8): 18.5" Measurements will vary slightly