EURO SIZING: Please see conversion for the best size to choose: Women's US 5/Big Kids' US 3 = Euro 36 Women's US 6/Big Kids' US 4 = Euro 37 Women's US 7/Big Kids' US 5 = Euro 38 Women's US 8/Big Kids' US 6 = Euro 39 Women's US 9/Big Kids' US 7 = Euro 40 Women's US 10 = Euro 41 Elevate your easygoing look with a pair of the Birkenstock Women's Arizona Big Buckle Birkibuc Sandals. These Birks are crafted from skin-friendly, tear-resistant Birk Flor nubuck material and are equipped with two adjustable straps that boast oversized, metallic buckles for a little extra elegant allure as you pass along familiar and newfound paths.