15 month olds

Nikole

hi guys just wondering what size diapers your babuesvare wearing and weight? my 15 mo old used pampers and isbobly 21 lbs and I feel like size 4 are getting tight? also my daughter babbles but not saying any words other than dada! mama! And she doesn't really even say it to us but knows who dada and mama are as when we ask she looks for us. is that normal? or is she behind? ty