It is 215 mm wide at tread, could be any diameter. If a 15 inch, it will be designated something like "p215 70R 15"
P215/60R15
The tire size is P215/65TR16 on all four.
The tire size is P215/60R16. 94T M+S
P215/60R16
P215/65R17
p215/70R15
P215/65r15
P215/55R17
If you have 15" inch rims, the default factory tire size is p215/70.
The tire size of 2012 Toyota Avalon is P215/55R17.
P215/60R16
P215/65r15