Super cozy duckfeet shearling boots in excellent used condition. Bought them in the gorgeous nut color. According to their size chart EU 40 is equivalent to a size 9.5. I wear a size 9 and these were great with a pair of thick socks. From duckfeet product page: STYLE: - Pull-on boot with stand-up/fold-over collar MATERIAL: - Water- and eco-conscious Terracare® pebbled leather LINING & INSOLE: - 100 % premium European sheep wool lining and fixed wool insole. The bottom of the shaft at the heel uses unlined leather for durability and shape. HEIGHT : -10 in (25 cm) tall ARCH: - None: the insole is flat. (Most inserts and orthotics are well-accommodated.) OUTSOLE: - Natural crepe rubber. FIT: - Medium-to-wide fit with a wide toe box that allows toes to splay naturally. Offered in European sizes, which are gender-neutral. ORIGIN: - All materials originate in Europe; final production occurs in Hungary.