Baseball Card Envelope Materials that have a pH of 7.0 or higher.Need a different size or material? This item is customizable. Please inquire.This product has been made in our facility in Brooklyn, NY! We are proud to have been certified as a Brooklyn-Made Company by the Brooklyn Chamber of Commerce. SKU: TAS006019 PricingQuantityPrice1 - 49 $0.7550 + $0.60 $0.75 Quantity -+ Add to Cart DescriptionDescriptionMade to fit in the baseball card box. 3-1/8" x 4-1/8"