Hi,Dear customers! we advising you can choose size according your foot length in our size table. For example, if your foot length (Heel to Toe) is 26 cm,please choose size 8.5=42 in this model.Attention:1. There might be slightly difference in color, because of the computer monitor settings.2. With the difference in the measurement method, please allow 1-3cm in size deviation (1cm=0.39 inch).Thank you for understanding!!