A custom foam insert is a cushioning block cut with cavities that match your product, so the item cannot shift, rattle or knock against the box. TBPB makes them to your dimensions with no minimum order, and we beat any written quote on matching specs.
Choosing the foam
Three materials do most of the work. Polyethylene (PE) foam is firm, clean and common for electronics, tools and shipping inserts. EVA foam is smoother and denser, with a finished look that suits premium presentation: jewelry, watches, cosmetics sets. Polyurethane (PU) foam is soft and springy, good for fragile items that need gentle cushioning, but it can crumble at the edges over time. Pick by what the foam is for: protection first, presentation first, or both. If you want a premium feel, EVA is usually the answer; if you are packing a heavy tool, PE.
Cavity design: the part people get wrong
The cavity should hold the product firmly but let it come out without a fight. Too tight, and the foam tears or the customer cannot remove the item. Too loose and the product still moves. As a starting point, make the cavity a touch smaller than the product so the foam grips. Send us the actual product or accurate dimensions and photographs, and we model the cutout, including finger notches or lift ribbons for easy removal.
Layers, thickness and fit in the box
- Single layer: a base block with a cavity, for simple products
- Two layers: a base and a lid pad, to hold the product from above as well
- Multi-cavity: for kits, sets of bottles or tools in a case
- Die-cut sizing: cut to the inside dimensions of your box so there is no gap
Measure the inside of the box, not the outside. A foam block that is cut a hair oversize holds itself in place, while one cut undersize slides.
Foam versus paper inserts
Foam is overkill for light items. A printed paperboard tray or divider is lighter, cheaper to ship and better for the environment, and our paper inserts and custom packaging inserts cover those cases. For gifts and electronics, pair a foam block with a rigid box, or drop one in a mailer from the mailer boxes range to protect it in transit. Foam does not make fragile items drop-proof, so test a filled sample before you ship at volume.
Next step: send the product dimensions or a photo and a quantity, even one, and TBPB draws the cutout and quotes it.
Frequently asked questions
Is there a minimum order for custom foam inserts?
No. TBPB has no minimum order, so you can order a single insert to test a fit or thousands for production. Send the product dimensions or a photo and we quote the exact quantity.
Which foam should I choose?
Polyethylene is firm and clean, a good choice for electronics and tools. EVA is smoother and denser, suited to jewelry and cosmetics presentation. Polyurethane is soft for fragile items but can crumble at the edges over time.
How tight should the cavity be?
Slightly smaller than the product so the foam grips it. Too tight and the item is hard to remove; too loose and it moves. Send the real product or exact dimensions and we model the cutout.
Can the insert have finger notches or ribbon pulls?
Yes. Finger notches and lift ribbons make removal easier without damaging the product or the foam. Mention it when you request a quote and we add it to the cutout design.
How do I measure my box for an insert?
Measure the inside length, width and height of the box, not the outside. The insert is cut to fit those dimensions. If you have not chosen a box yet, send the product and we suggest both.
When is foam the wrong choice?
For light products, a printed paperboard tray or divider is lighter, ships flat and recycles easily. Foam earns its place with heavy, delicate or high-value items. Describe the product and we recommend honestly.
More Custom Packaging Inserts
See the full Custom Packaging Inserts range, or explore related options with no minimum order and our best-price guarantee:
