Our DD is likely the youngest in her 1st grade class since her b-day is 5 weeks past the state's cutoff. She is more petite than most of her classmates, but not hugely so. However she's likely to be smaller no matter what. I'm 5'6" and my DH is 5'7" (that's 168 cm and 170 cm, respectively).
Some of the kids in her class do look to be 2 years older though. I'm sure that there's red-shirting going on. At the same time, I can't imagine her being in K this year... reading at 2nd grade level, working on fractions and multiplication...
