People arrive at this question with one book, one print or one document and want a size for it. The answer is usually broader than they expect, because a one piece folder is designed to cover a band of thicknesses rather than a single item, and choosing the band is the real decision.
Work from your order history, not your catalogue
List what you shipped last quarter by volume. If eighty percent of orders are one or two thin items and the rest are occasional thick ones, size the folder for the eighty percent and handle the rest with a second size or a box. Sizing for the rare outlier means every routine order travels in a folder that is too deep, which costs you in board and in dimensional weight on every single parcel.
Symptoms of the wrong size, and what they mean
| What you see | What it means | Fix |
|---|---|---|
| Product slides inside a closed folder | The score used is deeper than the contents | Add a shallower score line, or move the thin SKUs to a smaller folder |
| Lock tabs tear during packing | Contents exceed the deepest score, so the packer is forcing it | Extend the score range upward or split into two sizes |
| Corners crushed on arrival | Not enough clearance around the flat footprint | Increase internal length and width, or move up a flute |
| Carrier bills more than the weight suggests | Dimensional weight from an oversized folder | Reduce the thickness band and check your carrier's current divisor |
| Folder will not lie flat in the packing station | Blank is larger than the bench or the stack | Confirm the flat blank size, not just the folded size, before you order |
Three things to send a supplier
Give the flat footprint of your largest item measured at its widest, the thinnest and thickest stack you will wrap, and how the folder closes: tuck and lock, a peel and seal strip, or tape. Those three lines let a supplier set the die, and the die is the thing that fixes your score range for the life of the order.
When a folder is not the right format at all
One piece folders wrap flat things. If the product has real depth, a rigid corner, or anything that will not lie down, you want a mailer box instead, where the depth is a wall rather than a fold. If the product is flat but fragile in a way that needs corner protection on all six faces, a box also wins. Mailer boxes covers that side.
Minimum, price basis and lead time
Minimum order is 100 units, from about $0.48 per unit at bulk volumes, confirmed on your written quote. The die and plates, design support, US shipping and a digital proof before anything prints are included, which is why running two sizes is a volume decision rather than a tooling cost decision. Lanes are Rush (expedited production plus air freight), Standard (air) and Cost saver (sea), with a floor of from about 7 business days, plus 2 to 5 for delivery. Specialty imported items can run up to about 12 weeks, and Rush adds about 7 to 25%, depending on the job.
The measuring method behind all of this is set out in how to size a one piece folder. Once you have your thickness band, send it to /quote/ and we will set the scores and quote it.
