Pea gravel can be defined as gravel consisting of small chipped and rounded stones the size of peas, hence the name. It is used in landscaping to provide a soft, uniform natural look and pathways that are very comfortable to walk on. It is used as a driving surface and in construction for aggregate concrete cells and surfaces. We carry pea gravel from several sources in Southern Arizona. This pebble blend will pass a 3/8″ screen (9.5mm) and be retained on a No. 4 (4.75 mm) sieve. Manufacturing processes and product tones and shape of the pebbles very.