I have a Wacom Bamboo Fun tablet (Bamboo Fun
), it's about 5-6 inches by 6 inches,I don't have the newest model, but if I remember correctly mine cost about 100$ but it appears the new ones are priced at apprx 200$. However I'd take a look around Wacom's site as they have a wide variety of tablets and styles.
I cannot express how much I'd recommend Wacom. They have incredibly affordable tablets and they work flawlessly.