Irresistible all year 'round, these classic mules by Birkenstock® have the added comfort of extra foam and a soft embrace of supple suede. Germany. Euro whole sizes 36 to 42. 36 (US 6), 37 (US 7), 38 (US 8), 39 (US 9), 40 (US 10), 41 (US 10.5), 42 (US 11).