Enter internal dimensions in millimetres and watch the sample box change proportion. The diagram helps separate length, width and height before the enquiry is discussed. It is deliberately labelled as an illustration: it does not generate a production drawing, certify a material or calculate a final manufacturing price.
Measure the packed product
Include protective material and any dividers when considering the space you need. A tight fit may look efficient on screen but leave no room for the actual packing method. If you are unsure, describe the product and let the real supplier help establish the internal size.
Quantity, ply and print colours give the manufacturer a starting specification. They do not explain everything: handling conditions, storage, closures and the intended delivery method also matter. Use the message field for those details. All dimensions and choices remain in the browser until the page is closed or changed.
Before choosing a finish, describe the journey: what goes inside, how it is packed and how it reaches the customer. Those practical details make the first specification more useful.