The optimal bathroom mirror size depends on vanity width, wall space, and intended function. For standard single-sink vanities (30-48 inches wide), the mirror should be 2-4 inches narrower than the vanity for balanced proportions—typically 26-44 inches wide. Height generally ranges from 30-36 inches, positioned with the center at average eye level (64-68 inches from the floor). Double vanities require either one large mirror spanning the entire width (minus 2-4 inches) or two individual mirrors centred above each sink. For maximum functionality, ensure the mirror accommodates users of different heights and provides adequate reflection for grooming tasks. Consider the room’s scale—oversized mirrors in small bathrooms create spaciousness but should maintain at least 3-4 inches clearance from lights, backsplash, and adjacent walls to prevent a crowded appearance. Custom sizes optimize unusual spaces or specific design requirements.
