Mylar bag thickness is measured in mils (one mil = one thousandth of an inch), and the most common options are 3 mil, 5 mil and 7 mil. In short: 3 mil suits light, short-term storage and single-use pouches, 5 mil is the best all-round choice for most products, and 7 mil offers maximum protection and puncture resistance for long-term or heavy items. Here’s how to choose the right thickness for your product.
What does mil thickness mean?
A mil is a unit of thickness equal to 0.001 inch. A higher mil number means a thicker, stronger bag with a better barrier against moisture, oxygen, light and punctures. Thicker bags protect better and feel more premium, but cost slightly more per unit.
3 mil mylar bags
3 mil bags are thin, flexible and economical. They work well for lightweight, single-serving or short-term products where maximum durability isn’t essential.
Best for: single-use pouches, samples, light snacks, short-term storage.
5 mil mylar bags
5 mil is the most popular choice because it balances strength, barrier protection and cost. It resists punctures well and keeps products fresh for longer, making it ideal for most retail and food products.
Best for: most food products, coffee, supplements, general retail (the all-round choice).
7 mil mylar bags
7 mil bags are the thickest common option, offering maximum puncture resistance and the strongest barrier. They are ideal for long-term food storage, heavier products, and items with sharp edges.
Best for: long-term food storage, heavy or bulk products, sharp-edged items, premium feel.
Which mil thickness should you choose?
- Short-term or light products: 3 mil
- Most products (best value): 5 mil
- Long-term storage, heavy or sharp products: 7 mil
If you’re unsure, 5 mil is the safest default for most brands. For long shelf life or products that could puncture the bag, step up to 7 mil.
Order custom mylar bags in any thickness
The Packaging Planet manufactures custom printed mylar bags in 3, 5 and 7 mil, in any size and style, with smell-proof and child-resistant options, low minimums, free design and free US shipping. Request a free quote to get the right bag for your product.
Frequently Asked Questions
What thickness of mylar bag is best?
5 mil is the best all-round thickness for most products, balancing strength and cost. Use 3 mil for light, short-term items and 7 mil for long-term storage or heavy products.
Is a higher mil mylar bag better?
A higher mil bag is thicker and offers better puncture resistance and barrier protection, but costs slightly more. Choose based on how long and how heavy your product is.
What thickness is best for long-term food storage?
7 mil is best for long-term food storage because it provides the strongest barrier and puncture resistance.
Do you offer custom printing on mylar bags?
Yes, we offer full-color custom printing on mylar bags in all thicknesses, with free design support and a digital proof.
