I have a fairly wide foot, and wear 9.5 street shoes. I ordered a size 41 testarossa, 1.5 sizes down from street, and it fits wonderfully! I am actually a little nervous about the comfort straight out of the box, and am wondering if I should go another .5 down. However I was able to climb in them today, and felt very secure (especially the heal, which i was worried about). The heal stays totally secure and solid the whole time even with maximum pressure on the heal, no wasted space! Also, the width of this shoe fits great for my wide foot, much better than my beloved dragons do, as well as the teams, which are similar none the less. Extremely comfortable, kinda pricy, well worth it. GET EM!