What's a normal NT measurement?

pamiva1

So I just got back from my NT scan (so cool to see baby!!)... but the tech could not give me any information until my blood work is back. I've seen so many posts here where people are told just by the number if there is reason for further concern. I realize that the most complete info is to combine the NT measurement with the bloodwork, but what's normal for the NT measurement on it's own? I am 12 weeks 1 day and NT fold was 1.78.