Slippers shed a bit, fabric has some wear, there are gaps in the fabric wrapped straps, and some of the fabric doesn't lay flat at the ends. 

Traditional Japanese warazori slippers, with blue print fabric straps. 

Slippers measure 9.75" long and 3 7/8" at widest point. 

All the information we have on these slippers is here. Origin, era, exact materials and whether they are handmade or not is unknown.