This a unique collectible for a Harry Potter fan.  I bought this in London years ago and had it custom framed (as the standard sizes here in the US are different than in the UK).  Frame measures 14 inches x 10 inches approximately.  The actual book page (from the Goblet of Fire) is approximately 8 inches x 5 inches, with a Hogwarts Express train painted on the book page.  I'm not 100% sure whether this is an original watercolor or whether it is a copy of an original, but it looks really cool and would make a great gift for any Harry Potter fan.