BUYER GUIDE / ROUND TUBE DIMENSIONS
Diameter and height are a starting point. A usable specification also describes the lid, base, insert and the way the packed object comes out.
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Include the cap, pump, shoulder, label protrusions and any protective primary pack. For a rolled document, measure its rolled diameter and length with the chosen protective sheet. A bottle volume or a flat sheet size alone cannot define a tube.
Name each measurement and its unit explicitly. A photograph does not establish a stock size or an available manufacturing range.
| Measurement | Meaning | What may change it |
|---|---|---|
| Internal diameter | Space available across the inside | Body construction, liner and holder |
| Usable internal height | Space actually available to the packed item | Base, lid engagement and insert |
| External diameter | Finished outside width of the tube | Body and wrap construction |
| Total external height | Finished height including the closure | Lid depth and base assembly |
A deep lid can change the reveal and overlap. A holder may raise the contents or occupy radial space. Confirm whether the user lifts a bottle, pulls a tab or tips out the object. The final drawing and sample should show these conditions together.
Supply diameter and height with units, quantity, destination and artwork status. Mark internal versus external dimensions and ask for the proposed tolerances on the drawing; there is no universal clearance inferred from these examples. Non-round packs instead need oriented length, width and depth.
Specify the packed item’s widest diameter and full height, then distinguish the required internal diameter and usable internal height from the finished pack’s external dimensions. Include the lid, base, insert and removal method. Confirm the final dimensions on a project drawing and physical sample.
BEFORE YOU START
Practical questions for a better packaging brief.
No. The photograph supplies a visual reference, not a dimensional drawing. Measure the real packed item and review the usable internal dimensions on a drawing and physical sample.
No. The cap, pump, shoulder, widest diameter and filled weight vary independently of nominal volume. Supply the complete container dimensions.
The base, lid engagement and any holder occupy different parts of the finished pack. A section drawing shows the space actually available to the contents.
No. Agree dimensions and tolerances for the chosen structure, contents and removal method, then approve them on a sample.