We replicated traditional cobblestones and made them in two strengths and thicknesses so they can be used for pedestrian walkways, medians or driveways. A Terra Craft product with a five year limited warranty, San Francisco Cobblestone thickness varies according to its use. Patio pavers are 2 3/8” thick, are intended for foot traffic and are often installed on a sand bed. Driveway pavers are 3 1/8” thick and support heavy traffic.