The biOrb Medium Easy Plant Set are plastic plants designed for use in the biOrb or other aquarium. Instead of a large plastic base these plants have a smooth weighted ball which is easier to fit into the ceramic media in the biOrb and holds it in place. The medium pack is suitable for 8 gallon / 30 liter and larger biOrbs. The height of the tallest plant in the twin pack is 11.42 inches / 29 cm and base width is 1.5 inches / 3.8 cm.