Finished! (the pic is poor because the sun wasn't out today and the bathroom was the best I could do). The original pattern (from Adorable Knits for Tots) was done with cotton glace; I knit this up in saucy sport and patons grace. The buttons were supposed to be on the outside placket, but I put the button holes there instead (and the buttons are on the straps, thus, in theory, making it adjustable.) I took out my cast on edges in order to expand the bottom seed stitch edge for fear it wouldn't be long enough. I then blocked the living daylights out of it so it'd (again, in theory) big enough. I'm learning my lesson - when knitting for kids, always make it MUCH bigger then you think you'll need it to be....