You will never pay for thin air for storage with us. You will always know exactly how much storage you are using without any surprises when you receive the invoices. We charge by volumetric space your stock adds up to on a monthly cubic metre basis. If you had 1000 units of stock each had dimensions of 20x20x20. We will convert it to cubic centimetre 20x20x20 x 1000 and then divide it by a million to convert it into cubic metre = 8cbm.