Mylar Bag Sizes Explained: Which One Is the Best For You

The standard Mylar bag size is 3x4 inches. However, there are many other sizes too, and they can go up to 20 x 30 inches. One of the most popular choices for packaging long-term storage food and other edible items in the United States is Mylar bags. These bags are made of polyethylene terephthalate (PET) and offer durability and flexibility. Many companies use them to pack items like snacks and other consumer goods.

Mylar bags have become quite popular in the packaging industry. The market for these bags is expected to reach $20.4 billion by 2031, according to research. But there are still many companies that do not know much about them. This article will provide a complete guide on Mylar bag sizes and how you can measure them to store your product in the right quantity.

What is a Mylar bag?

They are pouches that open up to be filled with the contents inside. It is made of multiple layers of materials. The outer layer is made of Polyester / BoPET and gives the external structure to the pouch. Its middle layers are made of Aluminum Foil or Metallized Film. This locks out oxygen and moisture and prevents them from entering the bag. The internal layer is made of food-grade polyethylene. This keeps the product inside fresh and in its original quality.

These materials have great elasticity and chemical stability. It works well as an air and moisture barrier. The bag has a flexible nature, which makes it one of the best choices for highly customizable packaging. You can store and sell different types of items in these bags, like salt and coffee.

The ability to block out odors and other elements is so high in this bag that it is one of the most used packaging options for weed and cannabis as well. They are usually made in a lay-flat format or have a gusset bottom.

Different Standard Sizes of Mylar Bags in Inches and Centimeters

They come in different sizes and dimensions according to the capacity they have for holding content. Let us start with the smallest sizes of mylar bags.

Small Mylar Bags

This size varies according to the item and industry that uses it. Businesses can get them made according to the capacity they need for the items to be stored, like salt or any other granular product. Here are some of the standard dimensions of the small Mylar bags:

• 2" x 3"

• 3" x 4"

• 4" x 6"

Dimensions of Small Mylar Bags:

Medium Mylar Bag Sizes

The second category is the medium one, which includes items like pasta and baking soda. They are made in different standard sizes to pack moderate quantities of the products. The standard sizes for medium Mylar bags include:

• 5” x 7”

• 6” x 8”

• 7” x 9”

Medium Mylar Bag:

Large Mylar Bags

The size is good to fill long term storage items like flour and rice. Many manufacturing companies prefer this size due to the large capacity it has. Here are the commonly used dimensions in large sizes:

• 8” x 10”

• 9” x 12”

• 10” x 14”

Large Mylar Bag:

Extra Large Mylar Bags

You can use the Mylar bags of this size when the items are in bulk quantities for storage or shipping. Companies store products like grains and rice in extra-large Mylar bags. Mentioned next are some of the standard dimensions: 

• 12” x 16”

• 14”x 18”

• 16” x 20”

Extra Large Mylar Bag:

How to Measure the Interior of Mylar Bags

Measuring the inside of a Mylar bag gives you a more accurate idea of how much space is available for your product. Always open the bag before you take measurements and take dimensions from the interior rather than relying only on the stated exterior size.

Width

You can measure the width with the usable distance between the inner edges of the side seals across the opening.

Height

The height can be measured from the bottom seal up to the bottom of the zipper or tear notch.

Note: Measure up to the top seal while leaving out the section intended for heat sealing if the bag does not have a zipper.

Measuring Mylar Bag with Gusset

You have to measure it separately if the Mylar bag has a gusset. Open the bag and measure the expanded gusset from front to back. You can use this for bottom-gusset bags and side-gusset designs. The measurement represents the actual usable depth when the bag is opened or standing.

Example of Measuring a Lay Flat Mylar Bag

A 4″ × 6″ (width x height) flat Mylar bag can have a smaller usable interior area. This is because a part of its exterior dimensions is occupied by side seals and the top sealing section. You can measure it by opening the bag and calculating the distance between the inner side seals. Measure the height from the bottom seal to the bottom of the zipper or tear notch, without including the top heat-sealing area. Here is the table:

Example of Measuring a Mylar Bag with a Bottom Gusset

You need to measure the interior width from seal to seal and the height from the bottom of the gusset to the bottom of the zipper or tear notch for this type of bag. Expand the bottom gusset and measure its depth from front to back to determine the usable base space. Mentioned next is the example:

How To Measure The Exterior Of Mylar Bags

The exterior part can be measured by following the standard Width (W) × Height (H) format. You can include the gusset size also if it is present. Place the bag on a flat surface with the zipper or top side facing upward. Make sure the bag is fully flattened when you start to take the measurements

Measure the Width:

You can start to calculate the bag width from the left edge to the right edge. The exterior width is taken from edge to edge and represents the bag's full outside dimension.

Measure the Height:

Measure from the top edge to the bottom edge of the bag. Do not include the hang holes in the height if the bag has them.

Note: Open the gusset fully and measure its depth if there is a bottom gusset or it is a stand-up pouch. This measurement represents the additional space created when the bag is expanded.

Example of Measuring a Flat Mylar Bag Externally

Suppose you have a flat Mylar bag labeled 4″ × 6″. The external measurement must be taken from edge to edge. Here is the table for the external dimensions of the bag:

Standard Sizes of Different Types of Mylar Bags

The table below shows the standard dimensions of various types of Mylar bags. Let us have a look:

Effective Tips to Choose the Right Custom Mylar Bag Size

Matching the bag dimensions with the product weight is not enough when choosing the right Mylar bag size. There are other factors that also need to be considered. Here are some of the tips that you can consider when choosing the right size:

Review The Volume of Product

You need to check how much physical space your product occupies. Items like powdered supplements and grains need different bag sizes even when their weight is the same.

Leave Space for Sealing

Never fill your bags to the top with the product content. You must leave some space above the product for a zipper or heat seal.

Think of the Shape of Product

The overall dimensions of the bag can be affected by the shape of the product. Items like powders and grains can settle in the space more easily. Irregular-shaped products might need extra room.

Leave Some Space for Product Movement

One should leave enough space inside the Mylar bag to let the product settle on its own. This lets the product be stored without any excessive pressure.

How Thickness Is Important for Mylar Bag Sizes

The strength and durability of your Mylar bag also depend on the thickness. It ranges from 3 to 4 mil for lighter products, but there are thicker options also available. Here are some of the thickness options:

• 4 mil Mylar bags work best for packaging basic food items where a moderate level of protection is required.

• The 5.5 mil Mylar bag has good strength and is ideal for dry and bulk items like granola and pasta.

• Mylar bags with a thickness of 7 mil or more are perfect for long-term storage products like grains and rice.

How to Choose the Right Packaging Size

The size of the packaging is the one that matches the needs of your product. A well-sized Mylar bag provides protection and represents your brand. You need to understand the nature of the item when choosing the dimensions. You can get different sizes, like a 3.5-gram Mylar bag for your product at LabelPouches. This is one of the most popular sizes for storing products like coffee and tea leaves.

We offer various sizes according to the clients’ needs. Our expert designers analyze your product capacity and create Mylar bags of the required sizes. You can also get the materials and other attributes personalized according to your preferences. Contact us today and place an order for Mylar bags from us now!