These coasters have been printed with the photographed designs I created with my collection of naturally-formed heart-shaped rocks from the Maine coast. The original flat-lay art for each was about 2 1/2 to 3 feet wide/long when I photographed them outdoors from a ladder. • Art is printed on sandstone by CoasterStone (USA) for moisture & heat absorption • Larger than standard-sized coasters at 4-1/4 inch square and 1/3" depth with cork backing • Cork label reads: Original flat-lay photograph designed with heart rocks shaped by the surf along the coast of Maine • Packaged in cellophane sleeves with SKU sticker