3-1/8 in x 4-5/8 in (8 cm x 12 cm) each. Menthol 5%. Feel it working instantly. Powerful targeted relief. Icy to dull, hot relax. Comfortable fabric. Stays in place. Wear for up to 8 hours. Targeted Relief for: Simple backache. Muscle strains. Arthritis. Bruises. www.icyhot.com. Recyclable carton. Made in Japan.