I made the set for the length 12 inches (extended to 24 inches) and 6 inches (extended to 12 inches) with additional 0.5 inch in each part to place the adhesive. Both are designed in two different height. They are 4 inches and 6 inches. . The black configuration is 6 inches height and the white one is 4 inches height. Both configuration content 6 inches and 12 inches parts. I hope you like it.