You will need: 6 – 8 bodysuits, 6 bottoms, 6 socks, 2 hats
I recommend doing about half and half short sleeve and long sleeve, depending on what season baby is born. For example, J is a late September baby (the 26th), so I have 4 long sleeve and 3 short sleeve onesies, 5 pants and 2 shorts in 3 month sizing.