My medium fitteds and covers are still fitting great but my M Happy Heiny Pockets are getting so hard to get on. I stuff them with a prefold so they are really, really bulky but I only use them at night. They seem to not be long enough anymore (if I don't get them on "just" right then she has plumber's crack
). DD is only 6 months and almost 20 pounds but I wonder if the size L would just be way to big. ??