This big pond liner can be used to create a water garden sized 4.5m x 4.5m x 1m deep 15' x 15' x 3' 3 deep. A large pond like this can hold a maximum of 20,250 litres of water 4460 gallons. One of our rubber liners in these dimensions with underlay would cost upwards of £370 yet this complete lining pack is available for a fraction of that cost incredible value!