1/4" wide x 1 3/4" long. The prong or nail part goes 1/4" into wood.,Steel Sawtooth with Zinc Plated Finish - silver - Made in the USA,Self-attaching NO-Nail sawtooth hangers for wood frames. No additional hardware needed,Installs quickly-an important advantage if you have a lot of frames to hang,The hardened finish allows the hanger to be hammered in without bending