What is the difference between the Favorite PM and MM?

The difference between the Favorite PM and MM handbags from Louis Vuitton is size. Apart from their dimensions, the bags are identical. The PM measures 9.5 by 5.5 by 1.6 inches, while the MM is larger at 11 by 6.7 by 1.6 inches. Find a large collection of Louis Vuitton bags on 1stDibs.