Part of a dinosaur motif I'm working on in Jacob's room, the line drawing is somewhere around 3 ft w x 2 ft h and done with acrylic paint markers. After it's complete, I plan on touching up the wall paint then adding more dinosaurs (probably as silhouettes) on the other walls. There's also furniture to repaint and curtains to embellish, but those things will probably happen later, after I wrap up all the half-finished projects scattered around the house.*
*Full disclosure: That's what I said before I started the dinosaur.