The sleeve is just that, a sleeve of protection that goes INTO the bag in order to create an extra "space" where you could fit a Wacom Tablet or another laptop (who carries 2 laptops?) if you want to know if it will fit your size Wacom, then learn to read. It says it will fit a 9"x12", and that's a Large, so I imagine a Medium will fit just fine. And if you don't have the bag then why do you care about the sleeve anyway? Sorry to sound so mean, I just wish people would at least try and figure things out before posting a comment.