Easy spirt deep red suede sandals or slides

I love these they are made so similar to Birkenstocks. They have soft suede slide in tops with cork & fitted foot insoles. A great neutral deep red color. I have tried to wear them a few times but they are too loose for me. The size is 6 medium. Purchased about 10 years ago. Every year I get them out & try to wear but I have to stop. They just don't fit me. I would say they fit more like a 7 or 7 1/2. They flop around on my foot.