Each poster is about 8000x6000 pixels. When printed they are approximately 55x37 centimeters.
I created them in Adobe Photoshop CC 2015.
Each one is exactly the same as original graphic prop created by Miraphora Mina and Eduardo Lima for Harry Potter and Half-Blood Prince.
Hope you like it!
HARRY POTTER characters, names and related indicia are © & ™ Warner Bros. Entertainment Inc. Harry Potter Publishing Rights © JKR. (s16)