Use cl_crosshairscale x, where x is a number, and the bigger the number the smaller your crosshair. Try starting at 2000 or so and move on up as you feel comfortable.
Also, no one seems interested in knifing in Office, so I'm going to raise my bounty to 10k.
Also, I'll add in 20k to whoever knifes Dr. Death.
(My terms are they must be AFTER I type this post, no knifing events)