Hi! I'm working on a design for you. Approximately what dimensions will the tattoo have? Should I take the back image you attached as a reference? Kind regards

So it's hard for me to say the size of it, because im not a tattoo artist, but based on what I measured, I want the tattoo to be with 15x13x15x13. I have pretty wide shoulders, so which is about 13 inches long, and I want the tattoo to be about 15 inches long. Keep in mind, I don't want it to cover all of my back, just most of it on the upper back area, while the lower part mostly consists of Toothless' tail.