I wear size 39 and these are true to size. I have average calves and they provide the right compression for me. I have bought compression socks which are sized according to calf circumference so wasn't sure if these would be ok but they are for me.
Response from Sport Leader
Thank you for supporting our product. We appreciate your insight and feedback as you motivate us to strive for outstanding product quality.
We are looking forward to seeing you again.
Thank you again for your support.
Decathlon Hong Kong Cycling Team