This is a terrific product for those of you who like to preserve your cards or photos. The sleeves are Crystal Clear polypropylene plastic (1.6 mil). The plastic is sturdy and does not easily rip, tear or wrinkle! It is acid and lignin free so it is ideal for storage and archiving.
The constant opening allows for quick and easy removal of items. These bags are often used for greeting cards, postcards, photos, and documents. Since we are in the business of selling greeting cards, we give our sizing based on standard card sizes.

A1/4BAR PLUS Size Plastic Sleeve
3 13/16" x 5 5/16"
(This bag will fit a standard A1 Card with Envelope)