When ordering any liner, it is very important to be aware that most companies cannot take back a liner that has been removed from its original packaging. This is due to the risk of pinholes in the liner caused by resting the liner against any rough surface. Even small particles of dirt rubbing against the liner can cause a tiny hole in the material. Once a liner has been taken out of its packaging, it is no longer resalable. So please be sure you have ordered the correct size, shape, style (overlap, beaded, etc.) and wall height. It is worth a few minutes of your time to measure your pool if you aren’t 100% sure of its dimensions. Once you receive your new liner, read the packing slip and the label on the box before opening it. If there is any discrepancy between the liner you ordered and what you received, leave it in the box and contact the retailer immediately.