Note I wear 6.5 and these fit perfectly. Pre owned Gently worn condition Experience comfort and style with Ilse Jacobsen Women's Tulip 139 Slip-Ons. Their stylish easy slip on design, lightly cushioned footbed, soft microfiber lining and a perforated upper make them the perfect beach and summer shoe. Sizes are 5 - 5.5 (Euro 36), 6 - 6.5 (Euro 37), 7 - 7.5 (Euro 38), 8 - 8.5 (Euro 39), 9 - 9.5 (Euro 40) and 10 - 10.5 (Euro 41) and fit runs a little small so if in doubt go with the bigger size. Ilse Jacobsen