Little girl dress buttons were produced and sold on Snow White card backers. The copyright imprint reads, "© W.D. Ent. 1937" and printed along the bottom is, "Hollywood" and "Reg. U.S. Trade Mark". The same card design was used to sell different buttons too. Card is 2.75" x 4.25".
This one features seven Doc-shaped buttons in various colors. Bakelite-like (plastic) material. Multiple colors. Buttons measure approximately 1" in length.
More Docs, all the same color.
Other dwarfs were also sold.
Plus non-Disney buttons, including Teddy Bears, animals, and various designs.