This is a fairly quick and easy pattern.
The headband is stretchy, so it can fit a lot of head sizes. If you want to make it for a baby, simply adjust the number of rows you use. If you want to widen it, add 2 more ch sts in the foundation ch. For a narrower headband, drop 2 ch sts from the foundation chain.
I also included instructions for two sizes of flower. One is approx. 3 1/2 inches across, and the other is approx. 5 inches across.