Re: How large is the Apple TV?
From the Apple TV FAQ....
Apple TV FAQ: Everything you need to know! | iMore
From experience my 3rd gen Apple TV takes up VERY little space. You will hardly notice it and easily fit it.
How big is it?
It's a little chunkier than previous Apple TVs, though not nearly as large as a Tivo or cable box. According to Apple's website, the new Apple TV is 1.3 inches tall by 3.9 inches wide, and 3.9 inches deep; it weighs about 15 ounces.
We've got some specs on the new Apple TV remote, too: It's 4.88 inches tall—yes, taller than the Apple TV itself—and 1.5 inches wide, with a depth of 0.25 inches. It weighs 1.66 ounces.