ONE box of approximately 350 mini acrylic (plastic) rocks or ice. Volume is approximately 1 cup or 250 mL. The pieces are approximately .40" x .42" x .55" (10.93 mm x 10.97 mm x 14.07 mm). These are fabulous as decorations: fill vases or clear classes, use as table confetti for wedding and parties, use as vase gems in floral arrangements for color in the vase.