Our natural teethers are the perfect answer to concerns over toxic chemicals and finishes. This maple teether is in the shape of the mathematical sign for Pi.Measuring 3" long, 3" wide and 3/4" thick.On the teether the numbers representing Pi3.141592653589793... are engraved on one side. Each is rounded and sanded smooth to the touch and to the mouth and gums. Large enough for babies to get their hands around and small enough to be comfortable in the mouth. The perfect gift for your "geeky" friends' new baby.