G by GUESS Hertle 2 Women US 5.5 Black Knee High Boot Synthetic Synthetic sole Shaft measures approximately 14" from arch Boot opening measures approximately 16" around The style name is Hertle 2. The style number is HERTLE2-BLK. Brand Color: Black (Main Color: Black) Material: Synthetic Measurements: Shaft measures 14", Circumference measures 16" and 1" heel Width: B(M)