Men's Used Size 10 (Women's 11) K2 Darko Snowboard Boots Medium Flex Freestyle

Worn for 1 week and the boots are too big for me. I wear a size 10 sneaker but should be in a size 9-9.5 snowboard boot. Recommend these boots for a US Mens sneaker size of 10.5-11. Product description below: A freestyle staple for over a decade, the K2 Darko is the perfect blend of classic and modern and is designed to keep you lapping in comfort and style. Mid-to-soft in flex, the Darko is packed with no-nonsense technology that works and offers an unparalleled fit. When designing the Darko snowboard boot, K2 combined tried-and-true traditional shell lacing with Mobility Conda™ liner lacing, powered by a BOA® dial liner. K2's Mobility Conda™ technology is micro-adjustable to provide superior heel hold and support. Underfoot, is K2's RollSole™ outsole atop a lightweight EVA midsole, maximizing medial flex and range of motion for grabs, tweaks, and presses, all while keeping your feet, ankles, and knees protected from the impact of those harsh landings. The breathable Intuition® Control Foam 3D liner is heat moldable to the exact shape of your feet and features ankle pockets and internal and external j-bars to hug your feet while keeping them warm and dry until you call it quits. Flex: Soft-Medium Tech Features: Mobility Conda™BOA® Liner Lacing Rolesole 2.0 Outsole Intuition® Control Foam 3D Liner Die Cut EVA Footbed