“I have never purchased cycling shoes before, but want to do more cycling with SPD clips for speed and efficiency.
I ordered these last week and just received them. I love them, but they seem to be too small. (I wear a 7.5/38 in street shoes and ordinarily go up a half to a whole size for athletic shoes, but read that cycling shoes are usually sized so that you can order your street shoe size.) When I tried them on, I was barefoot and my toes pressed against the top of the shoe. And again, this is without socks. Literally negative space for my toes. I am wondering if I should go with the 39, or go up to a 40 for proper fit?”
I can't say which one would work better for sure, but I can give you the measurements for the shoe lengths according to Pearl Izumi sizing information. Hopefully this can help you make a better informed decision.
Size 38 is 23.5 cm
Size 39 is 24.5 cm
Size 40 is 25 cm.
Size 41 is 26 cm