It runs small even if you are small side. Just for reference, I normally wear an X-Small at Target and Express. I sized up tp a small and the chest and waist were fine but the arms were pretty snug. I would size up at least one size. If you have larger upper arms, I would size up two sizes. I will probably have to get a medium to move comfortably. As someone who has worn arc flash clothing for years, I would have like to seen more updated styling on the FR Clothing for woman. The jeans are cut and patterned from the early 2000s (mid to low rise, heavy detailing on the pockets, and contrast stitching). You would be surprised at how much styling is a deterrent for girls joining STEM fields. Woman are judged on how we dress, especially by other woman. When we give tours to young girls at our research facility, we are often their first impression of a female engineer or technician. Its frustrating when the men look sharp and the girls look frumpy with ill fitting clothes. Also, I often have to be able to go from inside a electrical panel into a meeting with industry leaders. It would be nice to have more professional styled options. I don't want to look like a 2000s cowgirl all week.

I'm 5'7" and 125lb. I bought 3 of these in a small. I've had them for a few months and only dry on delicate. The sleeves are like 3 inches too short now. They look silly. For shirts that cost this much it is ridiculous.

I just got this last week. I love the fact that its light weight. It did running a little small, I normally wear a medium but ordered a large based on the reviews. Glad it did.

[This review was collected as part of a promotion.] I love this shirt. I work in a melt shop and even when sweating it doesn’t show through. Does run a bit small. I’m usually a Medium and the large fits my arms perfect and is fitting enough without being tight around the chest and waist.

I bought this shirt about 7 months ago and it has holes under both arms (not at the seams) and little holes around the bottom. It’s super comfy and I love wearing it but the holes just really disappoint me. My other Ariat shirts are great! Other than that, I love the Ariat FR’s!

[This review was collected as part of a promotion.] This top was a little thick but comfortable. Make sure you size up as they run small.

The shirt fit fine through the body and the shoulders but was entirely too slim through the sleeves. I normally wear a large and had to exchange it for an XL. It's a nice length though, just too skinny in the sleeves.

Was happy with the size it is true to size and very cute shirt

I normally wear a large in any ladies clothes, I ordered an XL since these were for work! I could not even get it over my head, this would have been a small in normal ladies clothes! Very disappointed!

It's a nice shirt but is cut too slim. It's plenty big in the shoulders, but snug in the chest. A larger size would be too big everywhere else.