klimperklein: Püppi zieht sich an - Freebook. I actually emailed her asking if anyone has used her patterns for preemies, and she said yes, people have told her that they work well.I'd say the onesie would be an excellent pattern.
Püppi-Klamotte... Das bringt das Christkind (Freebooks!) (Bunte Knete von Frl. Päng)