40 Regular width Birkenstock Rio Sandals Black Birko-Flor (synthetic leather), suede footbed. Good used. The photos describe the condition well. There's tanning of the footbed but the printing is very vibrant still. The straps, cork and soles are in great shape. Comes from a corgi and cat-friendly home. These don't seem to be made in adult sizes anymore. From Birkenstock: The BIRKENSTOCK Rio is a sporty, elegant sandal with a single strap and an additional backstrap that offers reliable and comfortable grip. It’s just the thing for hot summer days! The upper is made from the skin-friendly, hard-wearing synthetic material Birko-Flor®. Anatomically shaped cork-latex footbed Upper: Birko-Flor® Footbed lining: suede Sole: EVA Details: two straps, each with an individually adjustable metal pin buckle; backstrap “Made in Germany” I am selling all my non-orthopedic shoes (damn you Achilles tendinitis and ankle bone spurs!) Measures 10 7/8" from heel to toe on the bottom of the sole.