A:AnswerTotal width is 23 5/8 in.
The "computer" part of the tray is 15 3/4 in. The stationary part of the tray is 7 3/4 in. There is a cup holder that can be attached to the right of the tray. This add 3 1/2 in.
The computer part of the tray has 5 levels from flat to a 6 in. high slant. The first slant level is 2 7/8 in.
The legs can be as long a 10 in. --add another 1 1/2 in for the tray base .
There are 3 locking levels about 1 1/4 inch apart which can make the shortest level 6 1/2 in.
The length of the tray (from bottom to top) is 13 3/4 in.
A:AnswerI think it would definitely hold 17". Depending on the exact inches, you might not be able to tilt it, but it could sit on the mouse pad (the tilt surface is about 17").