Glass green marbles stones with smooth surface and flat bottom Perfect for vase filler, flower vase, fish tank, bowls, art / crafts projects, flower arrangement, mosaics, table scatter, and more Translucent - Light will shine through Each stone is measured 17-19 mm diameter (0.7 of an inch) 5 lbs bag is measured 8" L x 11.5" W x 1.5" H. Contains approx. 450 stones. Fills up between 5 and 6 cups