Each square glass coaster measures 3.5 inches and has rubber feet so it won't slip. Your design is carefully silkscreened directly on to the glass. Most customers put one at each place setting or display them on a table for each guest to take. The coasters come in bulk packing, however you can order white presentation boxes at additional cost. The boxes will arrive flat and require assembly for you to insert your coaster and complete with a peel and stick white bow.