I defer to your superior knowledge of men's shirts and have corrected that propaganda spin to “tailored shirt”, which I hope meets the criteria for non-label labeling.

I think you need to correct your blatant disinformation and propoganda: that is not a button down shirt. I know button-downs, some of my best shirts are button-downs, and that's no button-down.

If it's necessary to apply some label to the shirt, I think it's more correctly a “narrow spread” collar. However, I doubt it's necessary to apply another label, as it probably already has one.