According to my ruler, the length of the handle is 3 3/4", the blade is 2 9/16", and the cutting edge is 2 1/4".
Mine has been used and been to the spa, so it's possible the blade is a little shorter than stock, but this should get you close.
You also might be able to get some feedback on the custom offerings over on the Buck side of the forum:
http://www.bladeforums.com/forums/forumdisplay.php/701-Buck-Knives