Package Contents:1 x Pond LinerTechnical Specifications:Material: PEColor: BlackSize: 2x2m/6.6x6.6ftFeatures and Benefits:Suitable for aquaculture, water conservancy maintenance, agriculture, gardens and other placesStrong, 0.5mm thick PVC pond linerWeather-resistant, Eco friendly, anti-ultraviolet, extremely long service lifeSize Guide:Use the following formula to determine the required size.Required liner length = max pond length + 2 x max pond depthRequired liner width = max pond width + 2 x max pond depthAfter determining the number of liners needed, add 50cm to both the length and width to allow some overlap to help hold the liners in place.For Example:If the pond size is 1 x 2 x 1m (length x width x depth):Lining board length = 1m + (2 x 1m depth = 2m) + 50cm overlap = 3.5mLining board width = 2m + (2 x 1m depth = 2m) + 50cm overlap = 4.5mTotal lining required = 3.5 x 4.5m (4 x 5m lining)