Instruction: Answer the given question using the supporting document.

Input:
Question: size
Document: on the pen there are 2 buttons. i have them as + or - brush size)The buttons on the side are also touch sensitive.
pefect size for working in photoshop and painter. pressure sensitivity is awesome. very happy with this of this upgrade by wacom
Works like a charm. Love the wireless. Perfect size for use with my MacBook Pro. Highly recommend!
Worth to buy. Fits my backpack and the wireless is convenient.Size just like the 15 inch Macbook Pro Retina.
Wacom! Love it ... elegant products and great support. I'm delighted with my new Wacom and the small size is perfect!
The medium is the Perfect size. It reads the pen well and the various tips are great for different art effects and writing.
The item was great, but got the wrong size. Returned it for thew next smaller size. Daughter loves the unit.
Medium Size = Perfect sizePen = ClassicShortcuts = Better than the last modelWireless =  No need but an awesome featureIf you are a Wacom user, this is a nice upgrade
Love it I got mone in the medium size and fit great with the Artboard. Is little bit bigger than the laptop 13 in but is ok for me
Got this for girlfriend that is graphics design student. She loves it and is using this at every opportunity.I ended up getting the small which was the perfect size for her.
Answer: overall 15" x 10", but the active drawing area is only 8.8" x 5.5".