Material: made from quality foam, covered with green Plastic hair. It's foam material inside, it would NOT sink into water. Great for Decoration: beautiful bright green fuzzy moss rocks feel real and cute, fill moss covered stone into a bowl, vase, glass cylinder, or decorative tray to create a feeling of nature Applications: Add to potted plants, dioramas, class projects, and woodland displays. Excellent for topiaries, wreaths, miniatures, fairy , and terrariums. Green moss balls, moss decor arrangements, fairy and crafting. Specifications: Colour:Green Material:Foam + Plastic Hair Size: Small stone size: about 3 x 5 cm/1.18 x 1.97 inch Middle stone size: about 5 x 6 cm/ 1.8 x 2.36 inch Big stone size: about 7 x 9 cm/ 2.79 x 3.54 inch Package Contents: 30 x rocks Note: It's foam material inside, it would NOT sink into water. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.