The Magical World of Disney Trading Cards are a series of 25 cigarette-style cards (tiny) produced back in 1989 in the United Kingdom. The individual cards were issued with packets of Brooke Bond tea. Each measures about 3.6cm x 6.8cm (1.4" x 2.6").
The Snow White characters include the Queen (#2) and Miss White (#3).
The card backs mention an album that was available for housing the set, only 2 x 20p coins.
The set of 25.
For those interested in learning more, check out the Brooke Bond Tea Cards Reference Book by Ian A Laker, available through the The London Cigarette Card Co. Ltd. website.