This PondXpert 15m x 10m (49\' x 33\') pond liner is a popular choice with pondkeepers who are looking to create a large water gardening installation. A liner this size can be used to create a pond sized (LxWxD) 12m x 7m x 1m (39\' x 23\' x 3\'3\"). Of course your choice of pond design is limitless just remember that if you go deeper then you need to reduce the length and width. Once built a pond to the dimensions shown above could hold 15,000 litres of water (18,500 gallons).