Each precast plaster and hand-painted rock is unique. Use Creek Bed rocks to model dry creek beds or to set prior to pouring Realistic Water for creeks, rivers, streams and other waterways. 31 rocks measuring 1 3/8" - 4" (3.49 cm - 10.1 cm) l x 3/8" - 1 1/8" (9.52 mm - 2.85 cm) h