This is a set of faux moss balls for your decorative creations...Place them in your fairy gardens, your terrariums or anywhere you can use these great additions.. L# : 4 pieces / bag, single size about 10cm high M# : 8 pieces / bag, single size about about 8cm heigh S# : 30 pieces / bag, single size about 5cm high 42#?30 stones / bag, single size about 5 * 3cm 75#?12 stones / bag, single size about 8 * 7cm, 95#?12 pieces / bag, single size about 11 * 6cm, They are made with faux moss material over styrofoam pieces..They are light weight and never need watering..