The Large size measures out to - 3.3 in x 3.5 in
The Small size measure out to - 2.5 in x 2.7 in
The available mediums are the following:
Semi-Gloss - This is a thicker, scratch resistant stock with a satin/semi-glossy sheen
Glossy - A premium & thick stock with a glossy protectant film.
Matte Vinyl - A high quality stock that is scratch resistant, waterproof with a impressive hold on what ever surface you stick it to.