Sizing a carton around a gummy jar looks like a one measurement job and is not. Three things widen the jar after it leaves the moulder: the closure, the label, and any tamper band. Miss any of them and the cartons arrive a few millimetres too tight, which on a filling line means a stopped line.
Measure in this order
- Lid diameter, with the lid on and torqued down. On most wide mouth PET jars the closure is the widest point in the whole assembly. This is the number that sets your minimum footprint.
- Body diameter at the widest point. Usually the shoulder. Compare it against the lid and use whichever is larger.
- Label or sleeve allowance. Measure a labelled jar, not a bare one. A wrap label with an overlap seam adds thickness, and a shrink sleeve adds more.
- Total height, lid included. Base to the top of the closure, plus any induction seal cap or child resistant closure profile.
- Filled weight. Gummies are dense. Weigh a filled jar and use that number for the shipper spec, not the empty jar.
Add roughly 1/8 in of clearance in the footprint and about 1/16 in in the height, then write the result as internal length x width x depth and label it internal on the spec.
The corner void problem
A circle inscribed in a square touches the four walls at their midpoints and leaves a gap at each corner. For a jar of diameter D, that diagonal gap measures about 0.207 x D. On a 3 in jar that is over half an inch of empty space at each corner, and it is why a jar packed in a plain square carton can slide diagonally and knock. Three fixes are common, and they differ in cost rather than in effectiveness.
| Fix | What it does | Trade off |
|---|---|---|
| Corrugated or board fitment | Holds the jar centred with a die cut collar | Adds a component and an assembly step |
| Hexagon or round cornered carton | Reduces the void by changing the carton shape | Costs more board and does not stack as densely |
| Downsize to a snug square | Cuts the void by making the carton tighter | Less tolerance for label thickness on the line |
Shelf, shipper and pallet
Work the shipper out at the same time as the carton, not afterwards. Count how many cartons fit a case, check that case against a 48 x 40 in pallet with no overhang, and check the carton footprint against your retail shelf depth if it sells in store. Doing this in the other order is how brands end up shipping cases that hang off the pallet edge, which costs stacking strength.
Child-resistant features are available on request. We do not certify compliance; confirm requirements for your jurisdiction and product. Worth noting for sizing: a child resistant closure usually has a taller and often wider profile than a standard lid, so measure the jar with the closure you will actually ship, not a stand in.
Minimum, price and turnaround
Gummy jar cartons start at 100 units, from about $0.48 per unit at bulk volumes, confirmed on your written quote. The cutting die, the printing plates, design support, US shipping and a digital proof are included, so the cavity can be cut to your jar without a tooling premium. Turnaround is stated per product in three lanes, rush (expedited production plus air freight), standard (air) and cost saver (sea), from about 7 business days of production plus 2 to 5 days for delivery, with rush adding roughly 7 to 25% depending on the job.
Send a labelled, capped jar measurement and the fill count and we will size the carton and the case together. Start at request a quote, order from the page, or read the fuller .
