Ideal for A1 size art or photo up to about 3/8 inch thick. The protective closure feature ensures the adhesive will not come in contact with the contents of the bag when inserting or reusing the bag. Adhesive strip is on the bag.Crystal Clear Protective Closure Bags have the following features: - Crystal Clear Clarity - High quality material will not easily rip, tear, wrinkle, or fog - Adhesive on the bag protects the contents from the adhesive - Acid and Lignin Free - Archival Safe - USPS Approved - 1.6 mil thickness - 10% Recycled Content - 1/16" size tolerance - Bag sizes indicates the opening side as the first dimension