7.5kwh home charger cable size?

Hoping someone could help advise the size of cable that is required for a home charger. Looking to install a home charger with a cable length around 50m. House consumer unit is front of house but drive way is back of house at the end of my garden. So looking at going up into and through the loft, down the outside of house, along my fence line and through the garage. Roughly 50m. Car will be a Tesla model 3 and wanting a 7.5 kw charger. Happy to add more info if required.