Question on ultrasound printout numbers!

j&mmadison

I am 11w5d and had an ultrasound today. They said I was measuring about 12w1d. 

The top of the printout/photo reads "8.2cm/1.2/56Hz"

I am wondering what the 8.2cm means? If that was the crown to rump measurement that would put me at 14 weeks...I'm not sure what else it would be though.