This shirt is perfect! It washes well, I've worn and washed it a couple times and don't see any wear.
I'm 5'6 and typically a size 10-12 in pants and medium in tops.
I got a size large and it fits well. I usually size up once when ordering online but the next time I purchase, I'll get in a size medium just to see the difference. When I do, I'll update my review!
It's hopefully helpful for you to gauge sizing.

Great value for the price. Nice and light weight but not see through. Great for the FL. summers. Washes very well doesn't shrink. Followed the instructions hung to dry. True top that covers the behind. Many claim to be tops and are very short. I am only ft 6 in.. The side contour is a nice look.

I wanted a shirt that would be long enough to wear with leggings as I am part of the population that enjoys having the 2nd half of my shirt. Haha! Chose to get a large as I like it to be more fitted than loose and baggy. I am 5'7 but have a long torso and full bust. This shirt ticks all of the boxes and I'll definitely be getting more. It's great to wear with leggings, shorts and jeans!

Bought this shirt because of the reviews and before I even wore it I was impressed by how soft it felt. When I wore it I liked the fact I could wear it at home as loungewear or put on jeans and a jacket and dress it up. The material is very lightweight, breathable and like a said before soft. I decided to buy two more in different colors to change it up. I’m 5’4” and roughly 148 lbs for reference and I ordered a medium!

Love these. This is the 4th one I've purchased. True to size and an amazing bargain. Easy to care for and I like that they cover my bottom without being oversized or baggy. Ordered a X-Large and I’m a size 16. If your wanting a looser fit size up! Will definitely order more in different colors!!! Great Buy!