This is our best ever offer on pond liner. Choose this PondXpert Flexiliner pond liner 8m x 7m (26′ x 23′) and we will send it to you next day with matching liner underlay absolutely free. This large pond liner can create a pond sized 5m x 4m x 1m (16′ x 13′ x 3’3″). Such a pond could hold up to 20,000 litres of water (4,405 gallons). This is just an example only, you can use this flexible liner to make any shape or size you fancy.