Ok, you can go ahead and laugh, cuz in some silly way, it's funny. I knitted my sleeves too long. 
When you make these kinds of mistakes on something you've laboriously made by hand, it has to be recognized. I ignored it hoping that either I'd wake up the next day to find that I was mistaken - a trick of the eye - and the sleeves would miraculously be the right length. Or maybe my arms would grown five inches and the sweater would magically fit. My hubby had a good laugh at that one.
Then, thanks to blogland, a bloggy friend pointed out that I can rip back from the cuffs, and pick up the stitches and finish the cuffs going the other directions. PHEW! I can actually do that. A few years ago, I would have dumped this in my UFO pile, but I can honestly and safely call myself an intermediate knitter and the thought of cutting off those cuffs does not daunt me! HA HA!
These are a teeny pair of Classic Mittens (free - all sizes) I made for my darling niece for her 4th birthday. I love the pattern but the yarn was a compulsive, much-too-expensive purchase that I shouldn't have done. Grrrr. It's Claudia Handpainted (I know! What was I thinking!). So there you go.