This Snow White mug was designed by Applause Inc, of Woodland Hills, California, and it was produced in Korea. Measures 3.25" in diameter x 3.5" high. It probably dates from the late 1980s (as did the limited edition 50th anniversary mug, also by Applause).
Retail sticker on bottom of box reads $7.99.
Applause also produced Dopey and Grumpy head mugs (next post).