8-1/8" W x 3-1/3" H 

The standard holders have two 5 Mil layers bonded together.

Large, for the older U.S. notes that are sometimes called "horse blankets" by us "old time collectors" because of their larger size issued 1923 and prior.

Made of Prolar polyester, (The folks at duPont call their polyester Mylar.) These durable holders provide archival protection at an affordable price. Don't be fooled with phrases from PVC holder manufacturers use like, - free of chemical softeners and/or stearates. All holders made of PVC - even those that are softener free are not acceptable for long term storing of valuable collectibles.

NPS 350