The Medium Phoenix Worms are about 7/16" (12mm) long. This size is best for bearded dragons when they are about 4" to 6.5" long. Geckos, anoles, turtles, small skinks, larger tropical fish, and small mammals (hedgehogs, skunks, sugar gliders) are also fans of medium size Phoenix Worms.
Very satisfied... First time ordering from this company and first time feeding Phoenix worms! Larvae were alive and well when rec'd and my juvie beardie just loves them!