these hold aprox. 73 lp.s according whether they are sigles or double elbums.these boxes are made of heavy duty corrogated plastic and also have been stiched at the ends as if you are a dealer and carrying them about to the record fairs they will come apart these will come apart.the box is 4mm thick. lid is 3mm thick comes flatpacked and the internal dimensions are hight.just over 12 inches internal lengh .15 inches.internal width.9.3/4.inches plus handholds. comes platpacked. anythink you want to now just email me plenty in stock ships the same day.