Women's Wave Low Tops from Nothing New - size 8.5 w

Worn once, sell for 95 online, from same company as Thursday Boots. Super comfortable. Size 8.5 W, and are just too big for me. Wore one time, and washed them. They are just a tad too long/wide. zI am normally a 8.5 normal and 9 in a sneaker. I thought a 8.5 w would fit, but they fit more like a 9. Anyhow, they r very comfortable but my foot slips out.