When making one of that size, I sometimes cut the backing long enough that I have extra at the top. It then can be folded even with the top to stitch down when attaching the binding. At least, there's one side of the sleeve that I don't have to hand stitch! Also, can attach a sleeve with pins. Perhaps make a sleeve to be attached with pins but put the label on as a pocket to hold the sleeve when not in use. This allows the quilt to also be a cover (baby quilt) or table topper as well as a wall hanging.