Plastic pellets is also sold in five pound packages. The oval shaped pellets are great as a cushioning media when tumbling delicate gemstone material such as obsidian and cabochons. The approximate size of the individual pellet is 5mm x 4mm x 3mm. Five pounds of plastic pellets will fill a one gallon plastic bag as shown. For more tips on tumbling with plastic pellets see the article: Tumbling with rotary or barrel tumblers. Use the plastic pellets for stuffing dolls, bean bags and more.