Hey! I just looked at my tarantulaces- they are a 39. They were super comfy on me though. I bought these katana laces in a 39 and 38.5. The 39s fit me just slightly better-tight and snug but not killing my feet. I normally wear a very solid size 8 in street shoes. I am obsessed with my katana laces though. They are the best climbing shoes ever.