Make rocks for places where rocks might pop out of the terrain, such as embankments, ditches and hillsides. Mold is flexible and reusable.-Rocks range in size from smallest: 1 1/4" L x 3/4" W x 1/4 H to largest: 3 3/8" L x 1 3/4" W x 1/2" H -Rocks range in size from smallest: 3/4" L x 3/4" W x 5/8" H to largest: 3 3/4" L x 1" W x 3/4" H -Make rocks for anywhere on your layout. Mold is flexible and reusable.Rock measurements from left to right, top to bottom of mold:1 7/8" L x 1" W x 3/8" H2 1/8" L x 3/4" W x 5/8" H2 7/8" L x 7/8" W x 1/2" H2 1/8" L x 3/4" W x 3/8" H7 1/4" L x 3 1/4" W x 1" H2 3/4" L x 2 1/16" W x 3/4" H -Use this mold to cast rocks to model dry creek beds or to set prior to pouring Realistic Water™ for creeks, rivers and streams. Mold is flexible and reusable.Rocks range in size from smallest: 7/8" L x 5/8" W x 3/32" H to largest: 3" L x 1" W x 1/8" H