For your consideration, here is a Vintage Kislav Professional Wooden Glove Stretcher, with box.  The instructions are printed on the back of the box.  It measures 11 7/8 inches long.  It has very little wear on it and the spring has the proper tension.  The box is pretty worn.  It will be mailed in a box for protection.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (634.7a21c-.9hc)