Our Polydrain crates are available fully assembled for fast application on-site.Each single crate has an overall area of approximately 0.2 cubic metres which would give you an installation area of 400mm (H) x 500mm (W) x 1000mm (L).If you are looking for a cubic metre of Hydrocell, this would equal 5x 0.2 cubic metre crates, which can be purchased individually, or in a 1 cubic metre pack.