FIT Extra wide width (WW): Our unique fit gives you extra wide width and extra room around your whole foot. Comes in wide calf. Wide calf: 2" wider than standard. Shaft height measures 16" (size 8) Heel height measures 2.5" MATERIALS + CARE Man made materials. Imported. DETAILS Extra cushioned footbed; rubber sole. CALF MEASURMENTS: WIDE 6: 16.4 6.5: 16.6 7: 16.9 7.5: 17.1 8: 17.3 8.5: 17.6 9: 17.8 9.5: 18.0 10: 18.3 10.5: 18.5 11: 18.7 11.5: 19.0 12: 19.2 13: 19.7 EXTRA WIDE 6: 18.4 6.5: 18.6 7: 18.8 7.5: 19.1 8: 19.3 8.5: 19.5 9: 19.8 9.5: 20.0 10: 20.2 10.5: 20.5 11: 20.7 11.5: 20.9 12: 21.2 13: 21.7