There is no age at which taped diapers stop working. The switch happens when lying still stops being something your baby is willing to do.
What each one is better at
Taped diapers — better for newborns and small babies, better for overnight, and much easier when someone else is doing the change. You can undo a tab, check, and re-close without taking anything off. For a baby who is not yet crawling, they are simply the more practical option.
Pull-up pants — better from the moment your baby can stand, crawl or roll away mid-change. They go on standing up, come off by tearing the sides, and cannot be kicked loose. For a toddler, that difference is the whole argument.
The signals it is time
- Changes have become a two-person job.
- Your baby rolls or stands the moment the old diaper comes off.
- You are changing on the floor because the changing table stopped feeling safe.
- Toilet training is somewhere on the horizon — pants let a child pull them up and down themselves, which matters more than it sounds.
Most families use both
It is not really a switch for most people. Pants during the day, when your child is upright and busy; taped diapers overnight, when they are still and you want the easier change at 3 a.m. Both formats run through the same size range, so you are not learning two systems.
Baby Life Pants start at Size 3 and run to Size 7, using the same weight bands as the taped range — Size 5 is Maxi 11–18 kg in both. Whatever size your baby is in now is the size to buy.