look on your drivers side door on the specifications label.
P225/60r16
225 60R16
P225/60R16
235x70x15 this tire size on my 2001 s10 blazer
it is 225/60/R16
225 60 16
p/225 60 r-16
I just replaced one of mine, they are 225/60 R16. If in doubt, check the writing on the tire itself, the size should be labeled in the format as above (###/## R##).
215x70x15
r205 16
P265/70R16