I wanted to knit a sweater to "go" with it. I went through the unbelievable number of patterns on Ravelry, and decided to knit the Baby Valentine Sweater. (Ravelry Link.) It was fun to knit, and has my favorite construction technique - rounded garter stitch yoke with a lace patterned body.
I'm happy with the result. Though, if I was knitting it again, I would have added another pattern repeat to the body to give it a bit more length. The pattern said to knit the body until 1" from desired length. I hate that kind of instruction. So, the result is that proportionally the sweater seems a bit short. I would guess the size to be somewhere between 0-3 months. I think.
But I'm not sure that it "goes" with the hat as I had intended.
Oh well. I like them both anyway. And maybe, if time allows, I could knit a black and white stripey sweater with heart shaped elbow patches or heart shaped pockets or something.