Winter Round Swimming Pool Cover 28' + 4x8 Air Pillows Pillow Size: 4'x8' Pillows are used to push your pool cover up off the water's surface so the water won't freeze to your pool cover Pool Size: Fits 28' Round Pools 3-4 Foot Overlap (cover size is 3-4 ft larger than pool size) U.V. Inhibitors Protect the Cover From Sun Damage