If you can get hold of a few second hand ones of different kinds, then we found that a great (and cheaper) way to work out what was best for us. Ebay doesn't allow the sale of used nappies, but if you look on there you often find lots which people have bought, pre-washed and then sell without using so they're basically new. And as long as you sterilise and boil wash used second hand ones before use, they're often actually more absorbent and softer than new ones. What fits your baby will likely change as they grow and their shape (and what they eat) changes. My daughter's about to turn 2 and we've ended up using different types at different stages - sized 2 part nappies to begin with, then one size two parts when she got bigger and they weren't so bulky. Now she doesn't need changing as often and everything's a bit more stable we use pocket or all in one nappies as they're so much easier to pop on and off when she's trying to run away! And we have some super absorbent hemp and bamboo 2 parts one for night to last her through to morning.