I have a 15.5 neck, and I also found that the Epaulet large shirts were a little big in the neck when I first tried them. But I discovered that a wash and a trip through the dryer will shrink them down to be just about right. I wouldn't recommend that anyone do this until you first try washing them and letting them hang to dry. But if it is still a little loose you could try the dryer. I now do this for all of my Epaulet shirts.