Paolo Lillus ball chairs at Fab
The one here dates back to a design from 1966, but a design that was shelved, then rediscovered some years later and made into the chair you see here. Which probably accounts for the vintage football look.
Other sports balls are used for other designs, check them all out on the site - they look amazing. As this is Fab, the chairs are discounted right now too. If you want the one above (as an example), it sells for £1,511, down from £1,831.