Don't invest in too much preemie clothes. Like dizz said, in the NICU they will be in just diapers in warming beds or incubators for a while anyway. By the time my 33 weeker was in a regular basennete in the NICU, preemie clothes barely fit and by the time she came home a week later, she was fitting in newborn size clothes. I did end up needing quite a bit of newborn clothes though and had to go out and buy them, I'd say she was in that size for a good month before she started to fit into the 0-3 stuff. Preemie clothes I think are only for up to 8 lbs. at the most (might even be 6 lbs.), so they're super tiny.