These are diet slippers produced by Instagrammer Neco. I purchased them through a pre-order. The L size (25.5-27cm) was added to the sale at short notice. It seems that the L size is not often listed on flea market sites. The color is greige. My foot size is 25.5-26cm, and I have a low instep, but the fit around my foot was a little loose. I used them at a flooring job, wearing socks. I don't remember if it was from the beginning, but the side is slightly peeling. It doesn't affect use. They can be washed completely.