Louis Vuitton Neverfull bag size comparison: PM vs MM vs GM

Bag Size Comparison Guide Louis Vuitton bags come in a range of sizes, from the smaller BB and PM to the larger MM and GM models. The size of many Louis Vuitton leather goods models is classified by an acronym that indicates its relative proportions. The most petite version of a given bag is the Baby Bandoulière, referred to as "BB", with the next size up being the Petit Modele or "PM". The Moyen Modèle, "MM", is a medium-sized and the largest iteration is called the Grand Modèle, "GM".