I ordered my normal neck size (16.5) but couldn't button the collar. Came back and ordered the next size up. It sits (barely) on the neck. Here are my other observations. Pros: - The sleeve length was great. - Overall length seemed acceptable (maybe short with split hair if I was picky). - In general, the design was good (not perfect, but good). Cons: - Tight in the shoulders, loose in the waist. I can't fault the shirt too much, maybe my shoulders are too wide for this cut. However, I have another slim fit shirt and it fits perfectly. Absolutely unforgiving stuff. It doesn't bend at all. It's a bit see-through (I'm wearing an olive green shirt in the photo). Not a problem for me as I wear a white jersey with him, just an observation. The collar seemed short. I would have liked a larger/normal collar. I am returning this shirt and will spend a little more to get something more comfortable for me to wear but if you are on a budget and need a shirt this might suit you.