Bathroom vanities in the 70-90 inch range are big, beautiful pieces best suited toward a master suite. Almost without exception, these are double bathroom vanities that come equipped with two full sized cabinets, 1-3 sets of drawers, and plenty of elbow room for two. Ones on the smaller end of this bracket (72" vanities are pretty common) are frequently sold as a single unit, but approaching 80" or more, you start to see a more modular design. These larger vanities come in a whole range of styles, but instead of a single unit, they arrive in two or three pieces. These modular units assemble seamlessly in your bathroom, but are much easier to navigate through doors and around corners during installation.