Is the size 2 gym ball the right size for you?

How to correctly inflate this ball

This 65 cm gym ball has been designed for stretching, fitness and rehabilitation sessions. Choose the size according to your body shape.

https://contents.mediadecathlon.com//k$003f72dd58bfa9147f89dee9630facfe/.jpg

https://contents.mediadecathlon.com/p2432464/k$d65cfd24145c5d147c1d90f64ed38e58/p2432464.jpg

https://contents.mediadecathlon.com/p2901382/k$418ecfa25ced6d1b9fb24d892fc121ed/p2901382.jpg

https://contents.mediadecathlon.com/p2901383/k$7987e3016f9365aaa6d6615f19748e26/p2901383.jpg