DD is going on 3.5 and is 30lbs. and maybe 36 inches. I've been a bit worried because she's growing so slowly in height--less than in inch in 6 months. She loves to eat, especially fruit and anything with JAM on it. She eats a lot--more than her string bean (43 in, 34 lb) 6 year old brother on most days, but she's so active that she doesn't gain weight rapidly at all. She's gained less than half a pound in the last six months. Her height percentile is lower than her weight one is, so I'm thinking she'll have a big height spurt one of these days. She has a gorgeous, strong little gymnast's body, and has a round little belly at the end of the day. Our tiny ds was IUGR (3lbs 5 oz, full term) and hasn't ever been on the charts for weight, but has finally hit the 4% for height. DH is 6 ft tall, I"m 5'5", so it seems like our kids would have the potential for more height, but dh was a late-bloomer, so maybe our kids will follow that pattern. We are also both naturally thin. DD2 is almost two and around 5% for weight and height.
They come in all sizes, and they're all perfect!