Exact Dimensions: Each bag measures 9" x 11 3/7", perfect for standard 8 1/2x 11 contents. Ideal for art and photos with double mats with backing, or single mats with foam board. Protective closure on the bag ensures contents will not fall out. Acid Free & Durability: Designed for keeping photos, document, paper or other important item from dust and color fading for long time. Comprehensive Protection: Water proof and dust proof. Protect your photos, document, paper or other important items from dust, moisture and color fading with these bags. Easy to clean, just wipe the bag with a tissue or towel. Crystal Clear:These transparent airtight bags are suitable for protecting and storing your artwork, photos, cards and so on, clearly showing the charm of artwork. Multi-purpose - These clear plastic bags are designed to comfortably fit picture mats, posters, cards, documents, papers and many other important articles. Protect the appearance of your articles from damage. TIPS: Please do not place small boxes in a damp place, it is easy to damage it after being damp. Due to long-distance transportation, it is squeezed to a certain extent and the size is slightly deviated. Please understand.