I wear a 10 Wide normally and this swim shoe was too narrow. The two blue bands across the front width of the shoe prevents the otherwise forgiving mesh from expanding to accommodate any size beyond a medium width. In addition, there was an area of pressure/irritation in the toe box  that felt like a blister waiting to happen (perhaps an untrimmed seam). My daughter ordered the &#34;Wave&#34; water shoe from Amazon and it is much more comfortable and wider. Although neither pair look well enough made to last very long, I'm returning these and ordering those. I'm just looking for something to initially try water aerobics without a major investment.