A mylar bag is the reason a bag of coffee still smells like coffee weeks after roasting. It is a laminated foil pouch that blocks the three things that spoil most products, light, oxygen, and moisture, far better than plain plastic. For coffee, snacks, herbs, supplements, pet treats, and any dry good that goes stale or clumps, the mylar bag is what keeps it fresh from your production line to the customer shelf.
The build is a layered laminate: a printable outer film, a foil or metalized barrier core, and a food safe sealant inside. The standard 3.5 to 5 mil thickness balances a strong barrier with a bag that seals cleanly and stands up on a shelf. Choose the format for your product, a stand up pouch with a bottom gusset for retail, a flat pouch for samples, or a flat bottom box pouch for larger volumes, and add a resealable zipper, a tear notch, a hang hole, or a clear window.
Printed edge to edge, a mylar bag is also your best shelf salesperson, so full color art, matte or gloss finishes, and foil accents all matter. We make custom mylar bags in your exact size and format with no minimum order, so a new brand can test a design on a small run and scale when it sells, at the best price. Send us your product, fill weight, and shelf life target and we will spec the bag.
Mylar bag sizes
These are the fill sizes customers order most often. Because we make to order with no minimum, we cut mylar bags to any width and height you need, as a stand-up bag with a bottom gusset, a flat pouch, or a flat quad-seal, with or without a resealable zipper. Send your product weight or exact dimensions and we will confirm the right size on your free proof.
| Fill or use | Typical flat size (W x H) |
|---|---|
| 1 g or single samples | 3 x 4 to 3.5 x 4.5 in |
| 3.5 g (eighth) | 3.7 x 4.7 to 4 x 5 in |
| 7 g (quarter) | 5 x 7 to 5 x 8 in |
| 14 g (half ounce) | 6 x 8 to 6 x 9 in |
| 28 g (ounce) | 6.5 x 9 to 7 x 10 in |
| Quarter pound (112 g) | 9 x 12 in |
| Half pound (224 g) | 11 x 14 in |
| Pound (448 g) | 12 x 16 to 14 x 20 in |
| Coffee or dry food, 8 to 16 oz | 5 x 8.5 in stand-up to 6 x 9 in |
Sizes are typical starting points; the exact fit depends on how dense your product is and whether you want a stand-up or flat style. We size it to your product and show it on the proof before you pay.
Mylar bag FAQ
What are mylar bags used for?
Keeping products fresh: coffee, tea, snacks, dried fruit, jerky, herbs, supplements, pet treats, and dry goods. The foil laminate blocks light, oxygen, and moisture, which preserves flavor, aroma, and shelf life far better than plain plastic bags.
What thickness of mylar bag do I need?
A 3.5 to 5 mil laminate is the standard for most retail products, giving a strong barrier while still sealing cleanly and standing on a shelf. Heavier gauges suit larger or heavier fills, and lighter gauges suit small samples.
Can mylar bags be resealable?
Yes. A press to close zipper or a slider lets customers open and reseal the bag, which keeps multi serving products fresh between uses. Single serve sizes can skip the zipper to save cost.
Is there a minimum order for custom mylar bags?
No. We make custom mylar bags with no minimum order, so you can test a size, format, and design on a small run before scaling, at the best price.
More Mylar Bags
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