That's so cute. Personally I prefer rectangular quilts. 44 seems plenty wide for a 4 year old, but you could add another row or two onto the bottom to give her more leg room as she grows. I'd probably add a solid pink 3" border , scrappy binding, and quilt a big heart in each block , plus stitch 1/4 inch away from each seam to make a frame per block. That way she gets a fun heart quilt on the back to look at.