The Karen Leonardo Featherbone Large Tool's tweezer may vary in length between 7 and 8 inches. The head of the tool measures 1 by 1 1/2 inches. The prongs are .07mm. Please remember: CAUTION: If the glass gets stuck in between the prongs DO NOT PULL, but quench and pick out the glass with a pointed stylus or razor tool. There is a fine line with the learning curve of making beautiful lines. Allow the hot glass to chill a bit before pinching/pressing. It should have a cooler outside skin, then press.