●COVER SIZE:Inner size 25” x 17” x 3.5” (L x H x D), fits most of 3000BTU to 5000BTU window air conditioners or indoor AC unit size of 23"-25"x 15"-17" x 3.5"(L x H x D).Pls measure your ac size before buying. ●HIGH QUALITY MATERIAL:Our indoor covers are made of 210D polyester/cotton, prevent wind and cold air from entering through the air conditioner, and also can prevents dust, dirt, and other small debris. ●EASY TO INSTALL: No tools need, there is an elastic strip that is sewn around the cover. Simply slip it on your air conditioner.Protect your A/C cover when its not in use. ●ENERGY SAVING: The built-in cotton indoor air conditioner cover prevents the leakage of heating and cooling air from entering the air conditioner, prevents heat loss in winter and reduces heating cost. ●PROTECT YOUR A/C UNIT: Keeping debris and other unwanted items out,saving cleaning time and extend the life of the air conditioner ,keep you and your family in perfect health.