Custom Bubble Mailers for Small Fragile Orders

Sizing Bubble Mailers to Postage Bands

Postage is charged by size and thickness as well as weight, so sizing a mailer is partly about the product and partly about the post. A large letter can be up to 25 mm thick, and many small items fit within that if the mailer is chosen carefully. Measure the product in its inner packaging, add around 20 mm to the width and 30 to 40 mm to the length to allow for the bubble lining and the seal, and check the total thickness when it is closed.

If your range includes items of different sizes, two or three mailer sizes usually cover everything. Ordering one size for every product wastes money on postage for the small items and squeezes the large ones. We can suggest sizes if you send us your best-selling products and their measurements.

Printing Your Brand on the Outside

The front of a bubble mailer has a large flat area that works like a billboard on the doormat. Many brands print a full-colour logo or pattern across the whole surface and leave a clear zone for the address label. Others keep the front plain and print a message on the back, such as a thank you or a social handle, so the branding feels like a surprise when the parcel is turned over.

Remember that couriers and postal staff need to read the label quickly. Keep the label area light in colour and free of busy patterns, and avoid printing anything that looks like a barcode or an address. Your free design proof will mark the label zone so you can plan around it.

Colour choice matters more on a mailer than on a box, because the envelope is seen at a glance and often in poor light on a doorstep. Strong, flat colours with a large logo are recognised instantly, while fine detail and small text get lost in the creases of a padded envelope. If you want a pattern, a bold repeat with plenty of contrast survives the bubble texture underneath far better than a delicate illustration.

Think about how the mailer looks when it is full, too. A slim product leaves the envelope flat and smooth, but a bulky one stretches the outer layer and can distort a logo placed near the edge. Centre important artwork on the flattest part of the face. Upload the logo through the free proof request and we will show it on the flattest part of the face.

Seals, Tear Strips and Returns

All our bubble mailers close with a peel-and-seal strip, which grips firmly and shows if someone has tried to open it. For a cleaner opening, a tear strip along one edge lets the customer open the mailer in one pull without scissors or a knife near the product. Brands that handle a lot of exchanges, such as fashion accessories or phone cases, can add a second adhesive strip so the customer can reuse the same mailer to send an item back.

These small features shape how customers feel about the order. An envelope that opens neatly and can be resealed for a return saves them hunting for packaging, and it makes your returns process smoother too. High-volume shops that want the same features in a plainer envelope use our e-commerce poly mailers.

Who Uses Branded Bubble Mailers

Jewellers send rings, necklaces and earrings in small gift boxes inside a bubble mailer, so the gift box stays pristine. Cosmetics brands post lipsticks, compacts and serums. Electronics accessory sellers ship cables, earbuds, chargers and cases. Musicians and record shops use them for cassettes and small merchandise, while craft sellers send pins, patches, prints and keyrings.

Subscription brands with slim monthly packs often find a printed bubble mailer gives them the unboxing moment of a box at a fraction of the postage. With the brand on the outside, the parcel is recognised on the doormat before it is opened. Glass and ceramics that outgrow a padded envelope move up to mailer boxes for fragile items.

Check the Closed Thickness Against the Large Letter Limit

The single most useful check before ordering is to put your product, in its inner box, inside a sample mailer, seal it and measure the thickness at the fattest point. Under 25 mm and it posts as a large letter and fits a letterbox; over, and the postage band jumps. Measure your two or three best sellers that way and the mailer sizes choose themselves.

Then pick poly or paper for the outer, mark a light label zone on the artwork, and tell us roughly how many you post a month. A custom quote comes back by email within one working day with prices from £0.25, and minimums quoted per job. The free proof shows the artwork with the label zone and seal strip marked. Production takes 4–7 working days after approval and tracked delivery to UK mainland addresses is free, taking 2–3 working days. Mailers that arrive damaged or with faulty seals are reprinted or refunded when reported within 10 days. Flat items that need no padding at all can go in printed card mailer envelopes from the same artwork.