i've only seen it in 2 sizes, GM (the one with the buckle) and PM.
Narkeasha has the GM
http://forum.purseblog.com/louis-vuitton/i-want-to-share-my-new-montaigne-azur-103236.html
Narkeasha has the GM
http://forum.purseblog.com/louis-vuitton/i-want-to-share-my-new-montaigne-azur-103236.html