Birkenstock Arizona Women's Cork Footbed Sandals in Stone Birko-Flor (38 M EU - 7-7.5 US Women) Synthetic Birko Flor upper is made of soft acrylic and polyamide felt fibres. Imported Arizona Women's 2-Strap Cork Footbed Sandals (Regular Fit) in Stone Birko-Flor by Birkenstock (38 M EU fits 7-7.5 US Women) Please note: Birkenstock makes the Arizona Sandals intentionally roomy for added comfort so they tend to run large. Most people prefer it this way since the buckles can be adjusted for a tight fit. However, if you prefer a very tight fit AND do not plan on wearing socks: we recommend purchasing a size smaller than you typically purchase. Faux leather Birko-Flor upper in a casual slide sandal style with an open toe. Twin adjustable buckled straps and flexible, shock absorbing EVA outsole. Product update: newly updated model (latest production 08/2016); Arizona may now ship in newly designed Birkenstock shoe box (new blue shoe box design with handy size measuring guide printed on inside of shoe box). Sandals may now also come with black (instead of yellow) lettering on footbed. Blue shoe box design and black print will be gradually introduced.