Is it like this?
if part.Size == Vector3.new(5,5,5) then
OK, so I just figured out that sometimes this works and sometimes don't, because the size of a part usually goes up and down very very very slightly sometimes, so how do you prevent it?
For example: A big part with the size 500,1,500 can sometimes become 500,1.00000000005,500 and yeah... that's really annoying