2 Best Steps Show You How To Calculate Box Size
When you tell your supplier you need a custom decorative box, they will ask you the first and also the most important point- size. Now we guide you to know which dimensions should you measure for your supplier, and how to calculate box size for multiple items.
一，What dimensions we should get to calculate box size?
Maybe you have got this status that the supplier ask you what is the size of box you want to be quoted when you inquire. Now you should show them the external or internal size to quote. There is no possible to provide custom quotation without the size.
1.1 What's external and internal size before calculate box size?
External size
The external space size formed after the paper tray is formed reflects the size of the space volume.
If the box is measured by its outer dimensions, it may prove to be problematic because the outer dimensions will not affect the thickness of the box, which may lead to the packaging not to be very fit.
Internal size
The size is only for the inner space for products, which include not the thickness of cardboard.
Although it seems more natural and easier to measure the external dimensions of the box, the internal dimensions are really important for your custom packaging box.
二，How to calculate box size?
As we know, measuring the box looks like a simple thing. But to find a right packaging box for your product is pretty important for your business. Accurately mensuration a box for a customized packaging project is really additional complicated than it’s going to appear initially look. So what’s the best way to measure a paper box dimension in the correct way? The CBP Box, which is a professional packaging box manufacturer, will show you the ways to calculate the measurements of the box, so that you will find if it’s correct to your products.
Here we will list the top considerations and step-by-step guides for measuring the box size.
2.1 Inner size for all styles of box
To calculate box size, we have to know the inner size of box, which is most base data to build a box. The inner size of rigid box depends on the size of products inside, but it’s bigger than the size of products. You know, we have to make a inlay to hold the products inside and also protect the it.
So we have to take the size of inlay into consideration. From the picture above, there are much space between each area to hold the products. Then the real inner size of box should as below:
The inner size of box = the size of products + the size of space between products with wall of box. If you are confused to calculate it, share us with your size of products, then our team will help to draw a template of inlay. If so, the all size of box is got. Such as a template of inner box as above.
2.2 External and inner size for custom magnet boxes
Internal size: it need we measure the data from inside of box. It look like basic arithmetic, mensuration your dimensions with care needs some thought, and the listed dimensions are always interior size. The 3 main dimensions by that boxes are measured include length, width, and depth（Height）
- Length(L): The longest side when opening the box.
- Width(W): The shorter side when opening the box, but it is always the shorter side than the length.
- Depth /Height(D/H): The internal edge from the box top to the bottom, and the height measurement does not include flaps.
Calculate box size of ouside(External size): it is measured along the outside, which is larger than inner size. Detailed data of cutom magnetic box as below:
- Length: its length = +6mm+2*thickness of cardboard+inside length size
- Width: its width= 3*thickness of cardboard+ inside width size
- Height: its height=3* thickness of cardboard+height of inside
For square box, it should have equal sides in theory, but this is unlikely to be true in the packaging.
Therefore, please be sure to accurately measure each size to ensure that your packaging meets your product standards! And the packaging manufacture can fully understand your requirements, so that they could produce more suitable packaging boxes for your products.
2.3 External and internal size for custom box with lid
In the case of a two-piece carton (lid and bottom box), the height of the lid is given as the fourth dimension after the diagonal line, that is, length 350 x width 250 x height 150 / lid height 100 mm.
External size of lid and base box: it is measured along the outside, which is larger than inner size. Detailed data of magnetic box as below:
- Length: its length = 2*thickness of cardboard+inside length size
- Width: its width= 2*thickness of cardboard+ inside width size
- Height: its height=2* thickness of cardboard+height of inside
External size of box with collar: it have to take the thickness and height of collar into consideration. Detailed data of lid and bottom box with collar as below:
- Length: its length = 4*thickness of cardboard+inside length size
- Width: its width= 4*thickness of cardboard+ inside width size
- Height: its height=3* thickness of cardboard+height of inside
2.4 External and internal size for drawer box
For the drawer box, we have added the thickness of sleeve into consideration. The most common thickness of cardboard of sleeve is 2mm-3mm, and the paper sleeve is between 0.3-0.4mm
External size of drawer boxes: it have to take the thickness of sleeve into consideration. Detailed data of lid and bottom box with collar as below:
- Length: its length = 2*thickness of cardboard+2*thickness of sleeve+inside length size
- Width: its width= 2*thickness of cardboard+1*thickness of sleeve+ inside width size
- Height: its height=1* thickness of cardboard+2*thickness of sleeve+height of inside
2.5 External and internal size for paper tube packaging Box
For the cost of the round packaging box, there are two dimensions that are very critical, which is what we said the diameter and the height.
If you want to know the price, just tell us the diameter and height of your product, or the inner diameter and inner height of the round box, we will provide you with the price and make a cost analysis for your reference. Maybe this will help you to make a decision before purchasing round paper packaging box.
