Built to last and maintain vibrant appearance. Fits 48- or 52-inch sidewalls. Double-welded seams to beat the cold temperatures. Available in your choice of sizes. The Blue Wave Blue Swirl Bottom Round Overlap Pool Liner 48/52 in. Deep is constructed of standard-gauge vinyl that will fit 48- or 52-inch sidewalls. Durable, double-welded seams provide quality that will hold up the coldest temperatures of winter. It has solid blue walls and a pattern on the flat bottom that is reminiscent of the way sunlight reflects off of water.Dimension options (based on availability):15-foot diameter18-foot diameter24-foot diameter27-foot diameter Size: 15 ft. Diameter.