To determine the size of the pool pillow you need, you should consider the size of your pool. The suggested air pillow size varies depending on the size and shape of your pool. You can use the following chart as a guide:

• 12 Round: 4 x 4
• 15 Round: 4 x 4
• 18 Round: 4 x 8
• 21 Round: 4 x 8 or (2) 4 x 5
• 24 Round: 4 x 8 or (2) 4 x 5
• 27 Round: 4 x 15 or (2) 4 x 8
• 30 Round: 4 x 15 or (2) 4 x 8
• 33 Round: 4 x 15 or 4 x 15
• 18 x 40 Oval: 4 x 15 or (2) 4 x 8
• 21 x 43 Oval: 4 x 15 or (2) 4 x 8

Its important to note that larger pools may require multiple pillows. While it may be tempting to use something you already have on hand, like an exercise ball, beach ball, or pool float to help distribute the water, that won’t work the same as a specially-designed air pillow. In fact, using an exercise ball or other type of inflatable instead of a pool pillow may end up causing damage to the inflatable item, your cover, or your liner, so it’s best to stick to an actual winter pillow.