200 Sleeves for Postcards/ Covers size 4 1/4" x 6 1/4" ~ 2.5 Mil. Lowest prices @ ebay.com 

* Made of Crystal of Clear Polypropylene.

* PVC / PE FREE.

* Dimensions: 4 1/4" x 6 1/4" , 2.5 Mil.

* Acid FREE and Archival Safe.

* Opens on the short side.

* Protect Your postcards / covers....

* item: #0406

* Made in Japan. 

Thanks a lot !!!