Makeup Vanities
A makeup vanity is a seated surface, so it sits at desk height of 29 to 31 inches rather than the 32 to 36 inches of a bathroom vanity. Depth of 16 to 20 inches is plenty: anything deeper pushes the mirror too far from your face.
Width is decided by the chair rather than the wall, and knee clearance underneath is the specification that nobody lists and everybody notices. Every piece is made to order.