21 inch x 12 inch. Product is folded inside box. Soothing, cooling comfort on your favorite pillow. Simply fill with water for cool relief. Create your perfect sleeping temperature. Portable for a good night's rest anywhere. Non-gel, latex and phthalate free. As seen on TV. Customize your level of comfort! Cool: Use cloth side up on pillow. Cooler: Use shiny side up in pillow case. Even Cooler: Use shiny side up on pillow. Coolest: Place in fridge for 15-30 min. No more night sweats! www.chillow.com. Have a great invention? Visit: www.hamptondirect.com/ideas. Made in China.