This is a decorative leather embossing stamp featuring an oak leaf shape.
The leaf shape measures 3/4" (20mm) long from end to end and 1/2" (12mm) wide at it's widest point.#
To use, just rest your dampened veg-tan leather on a hard surface and hit the stamp squarely from above using a mallet.
Once dry, your design can be decorated with Fiebings leather dye and sealed with Resoline surface finish.