“For my part, as a global ambassador, I have sought to add value to Rolex by wearing the watch in a way that reflects positively on the company. This involves arranging for my shirts to be made with a slightly wider sleeve cuff on the left side than the right, to ensure the watch moves freely and is always visible” – Sir Jackie Stewart, Winning Is Not Enough
But looks like I got it wrong- its a wider cuff, not shorter. I am sure that I've also read shorter in another interview/ article.
The rest of the article is also worth a read..
http://www.timesonline.co.uk/tol/sport/formula_1/article2983573.ece