Purchased diapers from Redmart or FairPrice online together with other groceries. My LO was wearing size S till about 4 months+.
If u do not wish to get a carton or a full pack, u can find some gd deals for loose pieces of diapers or single pack here to try out 1st:
*NEW* Huggies diapers (size S 22pcs)
https://carousell.com/p/54290227
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