I would do them 4 across, 3 down....this will make the quilt almost square (46x49 aprox after seaming). To make it lap size (also for a wall hanging, or over the back of a sofa, etc)... Add a 2-1/2" strip of a white on ecru (to match the muslin) lace look fabric...you could also get muslin as close to the color of the blocks & add a layer of lace over it. Then back and bind in muslin. That would be very pretty. Instead of a muslin color for the sashing...you could use a very pale color with lace overlay. Either quilt with white (I would outline close to the embroidery with an invisible or muslin color thread...and then do a very open feathery design in each corner.. Actually, if you did a diamond outline, not too close to the designs, then the lightly done feather in each corner...that would really set these off!