w123 wheel trims sizes

[stretch1568]

hi is there any way buy looking at a set of trims to tell them apart been offered a set of 15" stainless wheel trims and not sure if they are 14" or 15" are they markked on the back mny thanx

 

[coalville126]

There should be a p/no. on the back of it if it's a genuine part. Failing that measure the distance of opposing clips which hold the trim onto the wheel rim. The nearest inch up would be the diameter.