How to Build a Gravel Patio - The Spruce
Pea Gravel Project Details . This project will help you create a gravel patio that is 16 feet long by 16 feet wide, with a gravel depth of 2 inches. You can adapt the dimensions to fit your patio's size. Because pea gravel is loose and tends to shift, you will need to build a wooden frame with pressure-treated landscape timbers or lumber to contain it.