What size tires do I need?

[Stoicc]

I've been doing a little bit of research but wanted to know what other people with the same rim size as me got for their tire size.

I'm getting 20x9 front rims and 20x10.5 rear rims but I'm not sure what tire size I should get for each wheel. I'm going with the Michelin PS4S for my tires.

Any and all advice would be helpful!
Thanks

 

[StingerTom]

I went with 20x9 all around and the tires are 255/35/ZR20's. The Toyo Proxes Sport tires are running well for me.