Men’s size 12 only have Size 12 so please choose that when purchasing- . Per website : “If you like a roomier slipper, or are a half size, we recommend sizing up.” So may work for size 11 or 11.5 depending on fit preference Bombas Tagged Ugg Men's Sunday Slipper The sturdy sherpa slipper you can step out in Sunday Slipper The slipper that looks as good as it feels. Designed with soft, ultra-warm, and fluffy sherpa inside and out, these also have a memory foam and EVA midsole for a high level of support and a rubber outsole so you can step out quickly without having to change into real shoes. Perfect for walking around the house (or just down to the mailbox) Features Sherpa Lining Memory Footbed