License plate holders are different sizes to accommodate different sized plates. What is the size of your plate? HRP
They are also different depending on where you are going to mount them. I didn't take photos of the back end of every 32 at Deuce Days NW in 201 but took enough so that you can find a plate or two mounted the way you want to mount yours. Deuce Days Victoria BC 2019 - Robert Davison (smugmug.com)
The Jalopy Journal
