I wear shoes 10.5. Depending on the manufacturer, I sometimes even have to order size 11. The Marc Joseph New York Atlantic men's leather loafers have 10 D(M). I held my breath when I asked about the shoes as I expected them to be too small for my feet. Imagine my surprise when the shoes fit perfectly. It just goes to show that shoe sizes (and dress sizes too) are somewhat arbitrary. These are comfortable shoes that are perfect for everyday wear. At least I thought so. However, there was another surprise. When my wife first saw the Marc Joseph New York leather loafers on my feet, she said, "These look really good on the beach. Why don't you wear those shoes to our daughter's wedding? Check over!