The Birkenstock® sandals that started it all live up to their reputation with extra comfortable molded leather and cork insoles, now with luxe and supple, vegan uppers. Germany. Euro whole sizes 36 to 42. 36 (US 6), 37 (US 6.5), 38 (US 7.5), 39 (US 8.5), 40 (US 9.5), 41 (US 10), 42 (US 10.5).