Heart-shaped foil balloons for Valentine's Day, weddings, Christmas, birthdays and other party decorating. Variant: black; 10pcs per set, 18 inch heart size. Pack dimensions are 190 x 160 x 20 mm (approx. 7.5 x 6.3 x 0.8 in) and total weight is 90 g, so the set ships flat and stores easily. Fill with helium for floating displays or with air for balloon walls, arches and backdrops. Inflate slowly and stop while the seams still look smooth to avoid splitting. Keep away from sharp edges, open flame and direct heat; store flat and out of sunlight between uses, and wipe with a soft dry cloth. Adult supervision is recommended around young children. Material is not specified by the supplier.