Standard sizes for bathroom vanity tops typically range from 24 inches to 72 inches in width, with depths varying from about 18 inches to 24 inches. Common materials used for bathroom vanity tops include:

1. Marble: Known for its luxurious appearance, but it requires regular maintenance to prevent staining.
2. Granite: Durable and available in a wide range of colors and patterns, it’s resistant to heat, scratches, and stains.
3. Quartz: Engineered quartz is non-porous, easy to clean, and resistant to scratches and stains.
4. Laminate: Budget-friendly and available in various colors and patterns, but it’s more susceptible to damage from heat and moisture.
5. Solid surface: Seamless and easy to clean, but can be prone to scratches.
6. Concrete: Customizable and durable, but requires regular sealing to prevent staining.

The usage of a bathroom vanity top includes providing a space for the sink, storing bathroom essentials, serving as a countertop for daily routine tasks, and enhancing the overall aesthetic of the bathroom. It’s essential to consider factors such as durability, maintenance requirements, style preferences, and budget when selecting a vanity top for your bathroom.