I was just reading Mao Asada's Wiki page and it says that although officially, she is 163 cm, she is actually about 166 cm. She had a growth spurt during Vancouver Olympic year, and she experienced a weight gain. She was heaviest at 49.5kg during Russian Cup, and went on a diet and month later got herself down to 48kg.
I know Wiki is not the most reliable source, but I found the page to be well-written as a whole, and also, I remember looking at Mao and Yuna at Vancouver and she looked taller than Yuna (who is supposedly 163 or 164cm) when they stood side by side.
I wonder if she grew another centimeter or two after Vancouver? People keep on remarking that she is thinner and I agree, but she seems to have put back the weight she lost and yet she still seems longer/taller. And her shoulder width seems broader than it was during Vancouver Olympics. If she did, then she's one of these rare people who grew in their early 20's!