Every size
1790 sizes, grouped by the rim they fit. Start with the number stamped after the R on your sidewall — a half-inch means a commercial tire.
By how tall they stand
The question people actually ask about trucks and off-road tires.
By how wide they are
Passenger and light truck
Whole-inch rims — cars, SUVs, pickups.
Commercial
Half-inch rims — trucks, buses, heavy trailers. Fewer sizes, and a failure on one of these is far more likely to end badly.