For me, I do once a week so - Day clothings & PJs 7 pieces each + 2-3 spares incase or leak or puke. Longsleeve onesies 1-2 pieces, sg hot, mostly short sleeves. Swaddles 1 per day. Bibs - lost count but good to have more especially if you intend to change every 2-3 feeds (or every feed if they burp out milk).