I am in between a medium and large usually. I ordered a large. It was a little more tight than I wanted.

I have a skin sensitivity to the sun and with this UV blocking shirt on, I had 0 irritation after half a day in the sun. It's lightweight and cooling so even though Texas heat is hot, I survived in a long sleeve shirt. I'm so glad I don't have to wear sunblock (I'm also allergic to sunscreen ingredients except for the pasty white stuff which I hate putting on)! I got the green/yellow and the color is nicer in person than online. The design is eye-catching on the back. Fit is tight on the shoulder and neck with just a bit of looseness around the waist so if you want it to fit like the model shows, go a size up. For reference, I'm 5'8", usually wear XS and XS fit me perfectly. The sleeves were long enough to cover all my arms.

No blue in "turquoise" color at all. Totally mint colored

No petite sizes

Cool and comfortable. Washes nice and appears wrinkle free. Runs large if one wants a close fit. Am ordering more.

Great fit, great quality, and very stain resistant.