RE: what size prefold should I order?
Do you mean infant regular (light green stitching) and infant premium (dark green stitching)? Or the larger regular (white stitching) and premiums (blue stitching). If you mean the larger sizes, I think a 4 month old would be SWALLOWED by the premium size. I mainly use regulars on Sarah, and premiums only at naps or nighttime. She can wear both sizes, but the regulars are so much more trim and as absorbant as we need.
HTH,
Beth, mom to older DD (8/01) and younger DD (10/06) and always missing Leah (4/22 - 5/1/05)