Custom Foam Inserts

How We Shape Each Cavity

Most inserts start as a block of foam cut to the inner size of the box, with cavities cut out to the outline of each item. The cavity depth is set so the product sits slightly below or flush with the surface, depending on whether a lid presses down on it. Finger notches at the side of a cavity let customers lift the product out without tipping the whole box over.

Layered inserts stack two or more sheets, so the product sits deep while a top layer holds accessories. A lid foam, often a flat sheet or a profiled one, presses gently down when the box is closed so nothing can lift out of its pocket in transit.

To shape a cavity well we need the true outline of the product, not just its overall dimensions. A drawing, a CAD file or a careful photo on squared paper all help. For irregular items, we may ask for a sample to test the fit. Our guide to measuring a product for packaging shows how to trace an outline on squared paper.

Matching the Insert to the Box and Your Brand

An insert only works if it fits the inside of the box closely. Measure the internal length, width and depth rather than the outside, because board thickness eats into the space. A rigid box with a wrapped lid has thicker walls than a folding carton, and a corrugated mailer has thicker walls again.

If you are ordering boxes from us at the same time, we size both together, which removes the guesswork. If you are fitting foam into existing stock boxes, send us one empty box or its exact internal dimensions and we will cut to suit.

Foam comes in black, white, grey and a few other colours. Black foam reads as premium and hides dust, white or light grey suits clinical and bright brands, and a coloured foam can echo your packaging palette. The top surface can be left plain, laminated with a thin skin or flocked for a velvet feel.

Foam itself does not take printing well, so branding normally goes on the box or on a printed card sheet that sits above the foam. A short message on that card, such as how to lift the item out or where to register the product, is a useful touch that costs little.

Products That Benefit Most From Foam

Electronics brands use foam for headphones, smart devices, cameras and chargers, often with a separate pocket for the cable. Glassware and ceramic makers choose it for decanters, tumblers and mugs, where a single knock can crack the rim. Makers of hand instruments, measuring kits and precision parts use firm foam to keep every piece in its own slot.

Wine and spirits brands use foam inside gift cases to hold bottles and glasses together. Jewellery and watch sellers prefer thin, flocked foam that supports a small item without overwhelming it. Medical device and lab equipment suppliers ask for foam inserts that make it obvious when a part is missing from a kit, because an empty pocket is easy to spot.

• Electronics and accessories
• Glassware, ceramics and drinks gift sets
• Precision instruments and measuring kits
• Watches, jewellery and small luxury items
• Sample kits and sales presentation cases

Testing Fit Before a Full Run

The difference between a good insert and a frustrating one is often a millimetre or two. A cavity that is too tight makes customers wrestle the product out, and one that is too loose lets it rattle. For anything with a complex outline, such as a camera body with a protruding grip or a bottle with a shaped shoulder, we recommend checking a single cut sample before the whole batch is produced.

Send us one product, or a precise replica if the real item is valuable, and we cut a test pocket to the dimensions on the proof. You can then try the lid closed, shake the box gently and lift the item out as a customer would. Any adjustments go into the final cutting file, so every insert in the run matches the one you approved.

This step adds a little time but saves far more if a large order would otherwise need recutting. Bottles that need a grid rather than a cavity are covered on the corrugated dividers for bottles and jars page.

Decide Whether the Insert Travels or Displays

Foam grade follows the journey. An insert that goes through a courier network needs a firmer foam and 15 mm of foam wall around the product so a drop is absorbed; one that sits in a display case in a shop can be softer and thinner, because it only has to hold the item still and look good. Decide which job the insert does first, then measure the product's outline at its widest point and its height, and tell us the box's internal size and the foam colour you want.

Send the outlines, the box size, the colour and the quantity, and a custom quote comes by email within one working day, with low minimums quoted per job so a small batch of presentation cases is possible. The free proof shows the cavity layout before cutting starts. Production takes 4 to 7 working days after approval and free tracked UK mainland delivery follows in 2 to 3 working days; inserts that arrive damaged or cut wrongly are reprinted or refunded if reported within 10 days. Items that only need a single wall between them use the cheaper card box partitions for two items.