Kit boxes are the format most often ordered too large. The contents get measured individually, someone adds a comfortable margin to each one, and the finished box ships air at a dimensional weight price. This page gives the arithmetic that avoids that, plus the footprints most kits end up near.
Work it out from the contents
- Lay every item out on a table in exactly the arrangement you intend to pack, including the printed card and any tissue.
- Measure the overall footprint of that arrangement, not each item separately.
- Add the insert material thickness for every wall the layout needs, including the outer two.
- Add roughly 1/8 inch of total clearance so a packer can drop items in rather than press them in.
- Set interior height from the tallest item plus a few millimeters, and remember a lid that presses on the contents will bow.
A worked example: four products in a two by two layout, each 3 inches square, with 1/8 inch divider walls, needs about 6 inches of product width plus about 3/8 inch of divider, so an interior around 6.5 inches square rather than the 6 inches the products alone suggest.
Footprints kits tend to land on
| Kit type | Common footprint (L x W x D, in) |
|---|---|
| Slim monthly kit, samples and cards | About 8 x 6 x 2 |
| Beauty or wellness kit | About 9 x 6 x 3 |
| Standard subscription box | About 10 x 8 x 4 |
| Full kit with several products | About 12 x 9 x 4 |
| Gift or onboarding kit with apparel | About 12 x 12 x 6 |
Check the dimensional weight before you commit
Carriers price parcels on dimensional weight when it exceeds the actual weight, so an extra inch of depth on a kit box is charged on every shipment for the life of the design. Run your candidate dimensions through your carrier's calculation before ordering the die. Losing half an inch of depth is frequently worth more over a year than any discount negotiated on the box itself.
Inserts, and what happens when contents change
Kits change. A supplier substitutes a product, a jar gets taller, a season adds an item. Fitted trays are precise and unforgiving of that. A partition grid or a simple platform tolerates variation and is far cheaper to live with when the contents move each month. If the kit is a recurring subscription rather than a one off, that flexibility usually matters more than the extra polish of a shaped tray. Cell layout arithmetic sits on insert tray dimensions, and the category page is custom subscription boxes.
Ordering, minimum and lead time
Minimum order is 100 boxes, which suits the first month of a subscription or a one time onboarding kit. Unit pricing starts from about $0.48 per unit at bulk volumes and the figure for your run is on the written quote. Turnaround is stated per product: rush (expedited production plus air freight, premium of about 7 to 25% depending on the job), standard (air, from about 7 business days plus 2 to 5 days for delivery), cost saver (sea, cheapest and slowest). Because the die and plates are included and stay with your spec, monthly reorders of the same footprint do not restart tooling.
Photograph your contents laid out as you pack them, send that with the measurements to our quote form, and we will size the box and the insert together.
