The Audi is 17" summer, 16" winter - I would have kept my 15" Golf winter kit but 16" is the smallest fitment over the front brakes.
Odyssey already has tons of sidewall, so 17" - 17"
Daughter's Accent is 16" summer, 14" winter - tiny tires, big change between the two oem kits. Steering looser on the snows, turn-in less precise, but with this car you want all the sidewall you can get. My floor jack barely slides underneath, it's probably closer to the ground than the TR6.