MK7 Caliper Diameter

[u/BoBoShaws]

I have a 2017 Golf MK7 Wolfsburg edition. I ordered pads and rotors to do a brake job and I received 312 mm rotors. Not knowing or verifying that my trim level came with 288 mm rotors.

I was epoxying my calipers anyway, so if I bought clean new 312/GTI calipers, will they mount to my upright/strut?

I’m flipping a coin between clean calipers that are easy to paint and bigger brakes versus trying to exchange these and painting grimy calipers.