It is recommended that a vessel sink is mounted on a vanity of 31” high. Most vanities are anywhere from 32” to 36” on average. If any children are going to be using the sink regularly, then you’ll want to make sure you have a way for them to reach, whether it be a lower vanity or a stepping stool. On the other hand, if you or someone in your home is on the taller side, a vessel sink mounted on a standard vanity can help relieve some back strain.