Water Slippers Shoes NWOT

Flat soles with grey material on top, design reminds me a bit of cherry blossom, thin material. I believe these are for use in water, ie: poolside but enough to keep your feet safe from little shards of glass, or using in a collegiate shower-or any shared shower space. Size says medium, I'm 8.5 and these are not big enough for me. Length is about 8.5" toe to heel. 5# shipping limit. Pet friendly home but in storage tub. Wood in background is dining table, not the floor.