I read a lot about shoe size in this type of shoes, and every webpage said it had to be a little smaller than your actual show size. I found a chart where you can find a lot of climbing shoe models and the recommended size according to your level. In that chart, this model recommended a size smaller than your actual shoe size, so I bought a size 8 (I am size 9). I tried them on but they were REALLY SMALL!! I can't use them and now I have to order a new pair at least half size bigger.