File comes with 12 sets of numbers, allowing you to countdown from 32 days. Duplicate more numbers to countdown from a higher starting number. This countdown house was made on 1/8 inch (3mm) wood, you will need to adjust the slots for other thicknesses. Do not resize the file, as it will affect the slots. This project can be made on small lasers using 3 to 4 sheets of 12 x 12 inches plywood. Finished project measures 10 inches high by 10.75 inches wide.