Premiere Series Glass Block- DECORA® Pattern DECORA® Pattern Available Sizes Description 4" x 8" x 4" 6" x 6" x 4" 6" x 8" x 4" 8" x 8" x 4" 12" x 12" x 4" With its trademark wavy undulations, this pattern provides maximum light transmission with subtle visual distortion. The nondirectional faces make installation quick.