Packaging measurement guide
For a custom packaging quote, provide length, width and height with units, the opening direction, and whether the measurements are internal or external. Add the product dimensions and any insert requirements so the box can be developed around the actual contents.
The diagram shows an upright box with a top opening. In that orientation, length and width describe the base, while height runs from the base to the opening. This is an example convention: manufacturers, carriers and different box styles may label dimensions differently.
Write the order explicitly, such as “L × W × H in millimetres”, and attach a photo or sketch with the three dimensions marked. For a drawer box or a box displayed on its side, show the opening and front face rather than assuming the labels are obvious.
| Measurement | What it describes | Use it for |
|---|---|---|
| Internal dimensions | The usable space inside the assembled box, using an agreed measurement method. | Discussing fit around the product, insert and required clearance. |
| External dimensions | The assembled box’s outside envelope, including the relevant lid or closure. | Shelf space, an outer sleeve, shipping arrangement and storage planning. |
| Product dimensions | The complete item, including cap, protrusions, label and accessories. | Developing a suitable pack when the box size is not yet established. |
Illustrative example: “Required usable internal space: 160 × 100 × 50 mm (L × W × H). Top opening; product displayed flat; no insert selected yet.” This is a measurement description, not a recommended box size for an unspecified product.
If you instead have a product that measures 160 × 100 × 50 mm, report those as product dimensions. Do not automatically order a box with exactly the same internal size. The structure, insertion path, protection and assembly need to be reviewed before agreeing the working clearance.
If you measure in inches, keep the unit attached to every value. The exact conversion is 1 inch = 25.4 mm; for example, 6 inches = 152.4 mm. Do not round a converted value into a production specification without agreeing the required accuracy.
Include the filled product weight, whether items are fragile, and how the product is inserted and removed. A flexible textile, a glass bottle with a dropper and a rigid device can require different fit decisions even when their outer dimensions are similar.
For sets, list each item separately and show the intended arrangement. For paper sleeves, measure the assembled item where the band will wrap; for bottles, include the fitted closure. Paper sleeve specifications and essential oil box fit show those differences.
Use an explicit order such as L × W × H and label the units. Add a marked photo because orientation conventions can differ between structures and suppliers.
Either can be useful if clearly identified. Internal size helps discuss product fit; external size helps with a sleeve, shelf or shipping arrangement. Send the product dimensions as well when fit is important.
There is no universal amount. The product, material, structure, insert, assembly and removal method affect the working clearance. Confirm the proposed fit with an appropriate sample.
Give the maximum outside diameter and overall height with the chosen cap or dropper fitted. Include any unusual shoulder or protrusion and a photograph showing the orientation.
Include the product dimensions, weight, opening direction and any existing box measurements. Mark whether each dimension is internal, external or measured on the product.
Discuss your packaging projectPlan custom magnetic gift boxes or folding cartons for 1,000+ units. Ask for comparable 1,000 / 3,000 / 5,000-unit prices.
MOQ starts at 500 units, subject to specifications.