Custom Zipper Bags

Choosing Film and Thickness

Most zipper bags are made from polyethylene film. Clear film shows the product and colour of the garment; frosted film gives a soft, matt look that hides creases and feels more considered. Opaque white or coloured film is useful when you want privacy or a strong block of brand colour.

Film thickness is measured in microns. Lighter film suits small items such as socks or jewellery and keeps the bag flexible. Heavier film holds its shape, resists punctures from buttons or hangers and feels sturdier in the hand. We will recommend a thickness on your custom quote based on what goes inside and whether the bag will be posted or only used on a shelf.

If the bag needs to carry a barcode, size or care information, leave space in the artwork or plan for a small label. Printing size variations directly onto separate bag runs is possible, but a label is usually simpler for brands with many sizes. Our film finishes compared guide shows a logo on frosted, clear and coloured film.

Sizing Zipper Bags for Folded Clothing

Fold the garment exactly as your packing team will, then measure the folded piece. Add around 20 mm to the width and 30 to 40 mm to the length so the item slides in past the zip without catching. Remember the zip track takes up space at the top of the bag, so the usable length is slightly shorter than the overall length.

For thick items, a gusset makes a big difference. A flat bag stretched over a folded hoodie looks strained and the zip can pop open. A bag with a 40 to 60 mm base gusset sits flat and closes easily.

Many fashion brands settle on three sizes: small for accessories and underwear, medium for tops, and large for knitwear and trousers. That covers most of a typical range without forcing the warehouse to stock dozens of bag sizes. Our method for measuring a folded garment works for bags as well as boxes.

Printing Your Logo on Film

Plastic film takes print differently to card. Bold, solid shapes work best, and a single colour logo on frosted film looks particularly clean. White ink can be printed as a base layer on clear film so coloured artwork stays bright rather than looking see-through.

Keep the design clear of the zip track and seal edges, where print can distort. Most brands place the logo centrally on the front and add a simple line such as a website, care note or reuse message on the back. Full-colour artwork is possible for more detailed brand graphics. Short runs can use plain bags with logo stickers for plain bags until a printed run is justified.

Packing Tips From Fashion Warehouses

Fold garments to a consistent size before they go into the bag. A folding board at the packing bench keeps every T-shirt the same width, which means bags close easily and stack neatly in the mailer. If tops are folded differently each time, some will strain the zip while others swim in the bag.

Insert the garment with the front facing the printed side of the bag, so the customer sees the logo and the design of the item together when they open the parcel. Push out excess air before closing the zip; a puffy bag takes up more room in the mailer and can burst the seal if pressed.

For items with sharp parts, such as metal buckles or badges, turn them inward or wrap them in tissue first. Film is tough, but a sharp point under pressure can still pierce it. Keeping the bag intact is what makes it worth reusing, and reuse is what keeps your brand in front of the customer.

If you sell bundles, one larger gusseted bag that holds a matching set looks more generous than several small bags thrown into a box together. The outer bag for the courier is covered on our poly mailer bags for posting page.

Fold Your Largest Garment and Measure That

Zipper bags are sized by the folded garment, so fold a hoodie or a coat the way your packers do, press it flat and measure the length, width and thickness of the folded stack. Add 20 mm on each side so the zip closes without strain, and you have the bag. If you sell tees and hoodies, two sizes usually cover the range. Then choose the zip: a slider for retail and premium orders, a press zip for samples and spares. Pick the film by the look you want, frosted for a calm matt finish or clear for showing the print, and the thickness by how heavy the garment is. Artwork is a logo in one or two colours, sent as a vector file, and the free proof shows the print positioned on the bag with the zip marked. A custom quote comes by email within one working day, minimums are quoted per job and kept low, and bags are made in 4–7 working days after approval with free tracked UK mainland delivery. Misprints or damage reported within 10 days are reprinted or refunded. Thicker film with a barrier layer is on our mylar bags for a thicker film page.