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 36-42. 36 (US 5-5.5), 37 (US 6-6.5), 38 (US 7-7.5), 39 (US 8-8.5), 40 (US 9-9.5), 41 (US 10-10.5), 42 (US 11-11.5).