A method of forming a mold for use with a baseball or softball glove comprising covering a substantial portion of the inner surface of the glove with a thin sheet of flexible material, applying a forming material to the flexible material such that the flexible material generally conforms to the shape of the inner surface of the glove, removing the hardened forming material from the glove, and removing the flexible material from the glove. The hardened forming material can be a mold for the glove, or can be used as a form to manufacture glove molds. The glove mold can be placed in the glove when it is not in use and secured in position by a strap or other suitable mechanism.