Need help from mummies please

Rachel • 👩 baby boy, Oliver Arthur Roberts born 7th January’19! Extremely happily engaged to my wonderful Fiancé 💙 2nd baby due May 2023 🥰

I know all babies are different weights etc but my baby boy is due in January and I’m totally unsure how many tiny baby and newborn clothes to buy. Any sort of help would be gratefully appreciated💙