From when I had my 20 week scan I just bought nappies constantly. I mostly stocked up in newborn size 1, til I was told I was having a big baby then started stocking up on size 2's and some size 3's.
Turns out my baby was normal size lol and he was in size 1 nappies til he was 3 months old, but then he went from size 2 to 3 very quickly, within weeks really
I stocked up quite a bit in pampers, then went over to huggies and I'm glad because I didn't like pampers at first and preferred huggies newborn, but now he's older prefer pampers.
With wipes I'd buy a few different brands and then see which one your baby gets on with better before stocking up loads.
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