Is there a size or scale guide when choosing bathroom vanity mirrors? We have been looking at framed ones like these. The counters will be 5, 5 1/2 and 6 feet long. There is also a powder room with a three foot counter. There will only be a single sink in each of the va it’s counters and one of the bathrooms will have an off centre sink to accommodate an ADA style roll under sink with below counter drawers off to the side.