Had a little back and forth with Lian on the sizing and he was very helpful. I sent him a picture of my foot on the measuring guide. It was right at the 43 line, so he suggested 42.5. I'm glad I took his advice as they fit perfect. For reference, I wear 10.5 in Nike, 10 in Adidas, 42 in Balenciaga, 43 in MMM, SLP, RO, FP.