Girl I feel ya! By 1 month my girl fit 0-3 months, by 2 she outgrew those and the 3 month size, by 3 months she was in 3-6 and 6 month size, by 4 she was in 6 and 6-9, 5 months 6-9 and 9 months, 6 months she was in mostly 9 months and some smaller depending on the brand....and now at 7 months she fits 9 months and 12 months, again depending on the brand...some of the 12 months are even TOO SMALL 😲 These kids grow way too damn fast, we go through clothes too much! lol