One of my BFF's has her birthday at the end of December. She celebrates 50 years of a life well-live. She is a grand friend. She is a music lover and a wonderful pianist. So this year I made her a 3-D card. I am sure that you have seen this design elsewhere in the craft world. I created my own version using my Pazzles' software to create the pattern. My piano's footprint is 4.5 inches by almost 6 inches. It opens to a height of approximately 3 inches. Enjoy.