Ultra Pro Postcard Soft Sleeves Ultra Clear | Holds 3-11/16" x 5-3/4" Postcards | 100-Count Holds Postcards 3-11/16" x 5-3/4". Toploaders Protects your collectibles from scratches. Archival-Grade Ultra Clear Polypropylene. Non-PVC premium sleeves and Acid-Free. Ultra Pro Item Number 81225