The 1950s Retired Pittsburgh Corning Wavy Thinline Decora Glass Blocks are a unique and vintage option for a fixed window in any room. These glass blocks come in a size of 7.75×7.75×3.1 inches and are clear in color, offering light transmittal while also being impact resistant and insulated with argon gas. Made in the United States, these glass blocks are a decorative and functional addition to any new construction project, bringing a touch of retro charm to any space.