Didn't get what I ordered.

By large if you wear medium

Fits great, sleeve length was great. Material was much thinner than you would expect for a thermal.

I did want heavier thermal shirts but these are nice light weight, would be better if they fit. I think these run small

The shirts are on the cheap side. Not good for extremely cold condition.

Fit is not exact !!!

These are good kick around the house shirts, and very cool for warm weather. But they are cheaply made. One has already ripped a hole under the arm, and this is my first day wearing it. Also, the lighter colored ones are basically see-thru. Otherwise, Lightweight and cool and good for the price.

Good for layering but also builds up static between layers.

A little too thin for winter.

Seams like a quality product, however, they run small.