You ideally want your indoor bench to be made from solid wood or reclaimed wood. The reason for this is because these types of wood are robust and hard-wearing, capable of lasting you longer than a lifetime.

The depth of a bench should be anywhere between 13 to 15 inches. Otherwise it risks being too narrow or too wide. Of course, keep in mind the person the bench is for - if it's for a child, the depth may need to be reduced to make it comfortable for them.