LinerWorld has the  best swimming pool liners for oval pools that measure 12'x18', 12'x24', 15'x24', 15'x25', 15'x30', 16'x24', 16'x32', 18'x33', and 21'x41'. Swimming pool fun starts with a great vinyl pool liner! Shop LinerWorld’s selection of the best unique, stylish, and affordable vinyl pool liner replacements for oval above ground pools.