Knobby Q offers a flexible bumpy bitable surface, perfect for getting new teeth ready for chewable foods. This stage 2 teether is covered with knobs to add just the right amount of sensory input to the teething experience. Knobby Qs are great for practicing biting and chewing skills. Teething on a Knobby Q leaves the mouth open for breathing and sound play. And Knobby Qs are easily grasped by little fingers. Knobby Qs are free of latex, lead, BPA, PVC and phthalates. Each Knobby Q is approximately 3 in diameter and ½ thick.