Two sizes are listed a W9 & 8. They definitely are not a size 8 (in women’s) maybe a men’s 8?? They are a Women’s 9

COMFORTABLE AMPHIBIOUS SANDALS - Vegan leather upper and neoprene lining provide a comfortable yet practical design for use both in and out of the water.
ADJUSTABLE STRAPS - These water sandals have 3-way adjustable hook and loop straps to customize
LIGHTWEIGHT SANDALS - ultralight phylon outsole provides a comfortable experience in and out of the water.