i asume your putting them in a frame. Overlap them on a colored backing sheet( the size of photo frame. Cut photo's down in size if need be ie cut off outside edges or cut to follow shape of person in photo. Then tape them with double sided tape to keep in place. Place inside frame & close back of frame. if not in frame & just on a heart shaped piece of cardboard the just glue lace to Rim of cardboard & it will give it a finished look. this means place photos 1/4 inch inside edge line. It will look great.