This spa pillow-hot tub pillow fits Infinity , Raindance , Serenity , and Also Four Winds (Note: The Four Winds Pillows are usually Black but other than color these will work.) It is 12 inches Wide and 12 inches Long it has 3 snap tabs on the back that are designed to snap into cups on the tub. It is Gray in color. Snaps are 10 inches apart (see pictures)