Poly Bag Buying Guide

Poly Bags are great for storing and shipping parts, clothing and even food products. Made from polyethylene film, Poly Bags meet FDA and USDA specifications for food contact. There a variety of poly bags in the industry that will meet your need. Here’s what you need to know… Determine what type of Poly Bag you need to store your parts/products and what size is required.

Flat Poly Bagsare standard bags that protect products from dirt, dust and moisture. Close bags with twist ties, bag tape or by heating sealing. Here’s how to measure Flat Poly Bags:

Width (W) x Length (L)

Reclosable “Zipper” Poly Bagsare great to use numerous times for different items. Use these bags for longer term storage. Here’s how to measure Reclosable “Zipper” Poly Bags:

Width (W) x Length (L)

Reclosable bag measurement does not include the zipper and lip.

Gusseted Poly Bags are great for irregularly shaped items and feature expandable sides and a fitted bottom. Here’s how to measure Gusseted Poly Bags:

Side Gusseted Bags

Width (W) x Length (L) x Depth (D)

The gusset is considered the depth of the bag.

Once you decided the type and size, you need to determine the Mil Strength. What exactly is Mil Strength? A “MIL” is one thousandth of an inch and measures the thickness of the bag. The higher the Mil strength, the more your bag can hold. Here’s a guideline for determining Mil strength.

1 Mil – Lightweight, great for temporary storage.

2 Mil – Most popular thickness, used for shipping light parts, clothing or protecting food.

3 Mil – Offers added protection, used for document storage, healthcare, restaurants, and kit manufacturers.

4 Mil – Offers heavier protection, used for items such as industrial parts and hardware.

6 Mil – Very strong, protects against punctures and tears, used for parts, gears and heavy metal objects.