This is a cozy blanket I just finished up for my 1 year old, its 30" by 25" and PERFECT for her carseat. It is getting a little chilly in our neck of the woods, and she needed just that extra little blanket we could keep in the car for her. I didnt have a pattern I just made it up from a stitch I learned a few years ago- I ALSO made a baby sweater from it. Its a great color celery green and white, the ends are trimmed out in the green it is going to look great with her carseat!
oh, here is the sweater I made when my youngest was a baby... here she is in it..