Bag Thickness Standards: What is a Mil?

Most bag bans regulate the thickness of bag materials in mils.  California has set the legal standard for a bag at 2.25 mil.  Some cities allow bags a little thinner, and others require bags to be a little smaller, but more bans have this measurement than any other thickness.

If you’re an engineer, you probably know what a mil is, but the rest of us need some help.

So, what is a mil?  A mil is a thousandth of an inch.  Generally, measurements of less than 1/8 of an inch are too small to see, but often we can feel them.

To give you a tactile sense of how MIL can be useful, here are some ordinary objects and their measurement in mils.

Thickness Measured in Mils

	Item	Mils
	Dime	53
	Credit Card	30
	1BAG Standard Bag	20
	10 pieces of paper	10
	Thick plastic bag	2.5
	Thin Plastic Bag –BANNED by most bans	.5

Bags of 2.25 mil are technically reusable, but few people reuse them.  A study by Save our Shores surveyed shoppers in Monterey CA county, after a bag ban had been implemented.  Out of the 740 shoppers questioned, only 4 had reused a bag of that thickness.  Save our Shores and other groups are advocating that bags be at least 4 mils in order to be classified as reusable.

Bag bans are new and as more information comes in about how regulations affect consumers and stores, modifications are likely to be forthcoming.  You can always call 1 Bag at a Time for a quote and ask us to check your local bag laws to make sure our products are in compliance.