Are you wanting to go the "most like disposable" route? For that, you'd want either pockets (have a waterproof outer layer and some kind of soft inner layer next to baby's skin, with an opening for stuffing the absorbant part) or AIO/AI2's (Waterproof outer, snap in (ai2) or sewn in (aio) absorbant part.
Your baby will likely wear mediums in most styles of pockets and AIOs, but look for the weight and measurements of each particular dipe to be sure.
We just started CDing about 6 weeks ago, and so far LOVE it. You'll definitely want to try all kinds of different dipes to see what works best for you!
Shanna <><, blissful wife of Nathan, mama to Noah (6), Elliott (3) and Lydia Corinne, our unexpected unassisted homebirth baby girl
, born 01-24-08. Her birth story!