A:Answer I have a pair of ASUS 23" monitors on the top shelf, which look very much like the product photo (they hang over about 4" on either side).
The top shelf is 33-1/2" X 7-3/4", so a pair of 27" monitors might work, depending on the size of your monitor stand.
For example, I own a 27" monitor that measures 16" from edge of monitor to far edge of stand, so since 2x16 is 32, it could be done, with maybe 8" of overhang on either side of the desk.