How To Measure A Custom Box

When ordering boxes for your business, it is easy to become nervous about getting the perfect measurements. Boxes are an important part of your business, from shipping to packaging, and it can be frustrating when they arrive and are the wrong size for your needs. The most common mistake people make is supplying measurements for the wrong sides of the box, ending up with a shorter, longer or deeper box than anticipated.


In this article we help break down the cardboard box measuring process, to ensure you order the right boxes every time!

Internal vs External Dimensions

The first thing to understand when taking and supplying box measurements is that the measurements needed always refer to the internal dimensions of the cardboard box. In short, the space you measure is the usable space, not the outside of the box. The reason boxes are measured in this way is to ensure that your product or products are snug inside the box.


This is important as the external and internal measures can be different, up to 10mm depending on the grade and fluting of the corrugated cardboard.


If you are a business owner who wraps their products in bubble wrap, or tissue paper, be sure to add the necessary mm to your measurements. It is recommended that you add up to 10mm where necessary, especially if it is important for you to have finger room beside your product when placing it into the box.

How To Measure A Custom Box - Jetbox Melbourne
How To Measure A Custom Box - Jetbox Melbourne

Understanding Length x Width x Height
The standard box dimensions are given in this order: length x width x height (or depth).


If you give your measurements in a different order, the box you receive will be different than what you expect. As an example, a box that is 200L x 100W x 50H mm is very different to a box that is 100L x 50W x 200H mm. You can also double check this with your supplier if you are nervous about giving the correct measurements in the right order!


Let’s break these down a little bit more.

The length is always the longest horizontal measurement of your box. It can also be the longest opening dimension. The only expectation is if your box is a square, the length and width will be the same measurement.

How To Measure A Custom Box - Jetbox Melbourne

The width is the shortest horizontal measurement, or shortest opening side.

How To Measure A Custom Box - Jetbox Melbourne

The height, or depth, is the vertical measurement when the box is sitting upwards. The height is the measurement between the top and bottom of the box.

How To Measure A Custom Box - Jetbox Melbourne

Cardboard Boxes for Every Business

If you have been using ill-fitting boxes, you will understand the importance of a measured box for the safety of your products as well as the aesthetic. No matter the size of your business, Jetbox can supply the cardboard boxes you need to take your business to the next level. With no minimum order quantity (MOQ), we can make small batches for small business, as well as bigger runs for larger companies.


If you have ever been put off by an MOQ, our no MOQ cardboard boxes are the perfect solution to dip your toes into the world of custom cardboard boxes. There are a number of styles of corrugated shippers available, and we can customise each and every one to your business needs.


If you are after a standard size box, for your company or for moving, Jetbox has you covered too! We have a number of different boxes ready to go for whatever your needs may be, if you don’t have time to wait.


Australian boxes and packaging supplies with Jetbox

At Jetbox, we have you covered for any and all of your packaging needs. From the boxes themselves, to packing supplies, we are your one stop shop for packing. We offer bubble wrap, packaging tape, bio-fill and more.


Jetbox offers sample runs and prototyping on all our corrugated cardboard shippers. Our team is here for you, to help ensure you get the right box for your needs! From board grade to colour and quantity, the manufacturing team behind Jetbox take a custom-design approach to all our products.


With a quality corrugated box, you can mail your products safely. Contact us today to get your custom box journey started now!

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Bulky Item Delivery Terms & Conditions

Some of our products are large, heavy and bulky and require extra care or special shipping. If your order requires a forklift we will advise before delivery, and if no forklift is available upon delivery a surcharge will apply.

Bulky deliveries that require hand delivery (but no forklift) to the first floor or above and require stair or lift access will also be subject to a delivery surcharge. If you advise at checkout that your delivery is above the ground floor, we will be in touch regarding the surcharge. This surcharge is from $50 per pallet.

Over & Under Runs

Manufacturing processes require machinery to work at quite high speeds. During production, some sheets may be damaged and need to be replaced. In some instances, we cannot replace the sheets at that time and you will be met with a slightly lower Quantity than ordered. This amount will be credited to you.

In most cases though, there will be overruns, as the machinery cannot come to a complete stop in an instant – we require a gradual slow down, which will give us more cartons produced, than what are ordered. These overruns are payable by the client. And taking them also helps save on recycling, which is more sustainable and better for the Environment in the long term.

If you require EXACT Quantities, we may have to make some boxes in a different grade than ordered, to make up your order in the Exact Qty required. These requests will also Incur higher unit costs. This cannot be avoided, as we must consider the recycling processes and costs involved, in helping to reduce our carbon footprint.

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5C or B – Light single flute cardboard used for light packaging requirements or for products that support themselves.

4C or B – Slightly stronger single flute cardboard used for packing paper/notes/pads, etc. Usually for products that self support.

3C or B – Most common board grade usually used for virtually any standard light weight packing.

3C or B Super – Medium strength board that is slightly stronger than the above 3C/B board and can also be used for frozen goods.

1C or B – Strong single flute carboard used mainly for products that need extra support when stacking.

1C or B Super – Super Strength Cardboard that is mainly used for frozen food products that are transported long distance.

3 BC – Twin Cushion cardboard used for Removal Boxes and products that need that little extra care when packaged or for bulky items that may need thicker board when transported.

1 BC – Twin Cushion cardboard with some of the highest grade board for Superior support and stack-ability. Primarily for items over 30KG.