Hello and Welcome to the board :D:D:D
Prewash and dry the flannel atleast once if not twice, it shrinks a lot.
Preemie blankets should only be quilted minimally, there skin is very sensitive :wink:
Are you looking for a preemie sized pattern or a baby quilt sized pattern?
You may get more responses to your question if you ask it in the Main section :wink: