Overall Dimension: 16”x28”x3.75” (406mm x 711mm x 95mm) , Inside Dimensions: 12”x24” (305mm x 610mm); 100 percent ABS raw material, 100 percent leak proof shower niche, No seams and no liners, No additional; Light weight but no decreasing on quality, suitable for installing lights; With texture, quick and easy installation, Uni-Green brand, 10 years without leakage ; Easy to Install: Insert on the cement board, no need professional worker, you can do it by yourself. Overall Dimension: 16”x28”x3.75” (406mm x 711mm x 95mm) , Inside Dimensions: 12”x24” (305mm x 610mm);