*Sigh* So it appears that the measurements taken of the boys two weeks ago were off, and they are not, in fact, both measuring in the 50th percentiles for size. They are instead measuring in the 8th and 5th percentiles respectively. Our obstetrician is not worried that they are small, it's not unusual for twins. Nonetheless, I don't like the fact that they are so little...I guess as long as they are both growing it's ok, but still! All their measurements are looking great, and they are growing, so that is a little reassuring. But the 5th and 8th percentiles - that's TINY.