How thick are sandwich bags?

Sandwich bags can vary in thickness depending on the brand, material, and quality. On average, sandwich bags can be around 1.2 to 1.5 mils (0.0012 to 0.0015 inches) thick. These measurements represent the thickness of a single layer of plastic used to make the bag. It's worth noting that some sandwich bags may have double or triple layers for increased durability, leading to a thicker bag overall.