We went to the doctor on Tuesday for Kate's 18 month check up appointment. She's about 24 lbs., which is 50th percentile, and more than 33 inches, which is 93rd percentile. She's always hovered around these percentiles and in this proportion to height and weight, so the doctor was happy with her growth. He said that, assuming average growth rates, most people's adult height is double their height at 2 years old. If Kate doesn't grow another inch in the next 6 months she will be my height (a little taller than 5'7''), but most kids do grow quite a bit between 18 and 24 months, so she's probably going to be closer to 6 feet! Maggie, who is now only about 36 or 37 inches tall and a couple of pounds heavier than Kate, will probably be about as tall as I am.
Here are some photos showing Maggie last summer and Kate this summer wearing the same clothes. Maggie wore 24 months sized clothes at 30 months and Kate's wearing them at 18 months!