Wheel size and brake caliper

Hi! I need to replace the front driver side brake caliper for my 2008 4Runner sr5 v6 4wd. The tire for that wheel reads says P265/65R17 and the caliper that needs to be replaced reads #13WG. Is this the wrong caliper?

I’ve read online that #13WG is for the 16” wheel and the #13WH is for the 17” wheel.

What is my correct wheel size and which caliper should I order? They are the stock rims.