With a hidden pop of color, the Chooka Versa Prima Wide Rain Boot has a fully expandable printed back gore that opens the shaft up to 18". Adjustable back buckles and a memory foam insole provide additional comfort. Expandable back panel with functional buckles Removable EVA insole Treaded rubber outsole Heel Height: 3/4" Shaft Height: 15" (Size 6) Circumference: 16.5"-18" fully expanded (Size 6) Fit: This style tends to run large. For an accurate fit we recommend purchasing a 1/2 size smaller than you typically purchase. For example, if you normally purchase a size 7 1/2, we recommend purchasing a size 7. Upper: Rubber Imported