I usually wear medium sized shirts, but bought this in a large due to the advice from another reviewer on here. It’s the perfect amount of compression. Go two sizes higher if you want something looser fitting, and buy in your size for ultra tight (do not recommend an ultra tight fit, can be difficult to get out of after a workout with swollen muscles)
It’s higher quality than I expected for the price. In a sports store you can expect to pay around $60 for something of this quality from a bigger brand.
Great shirt - I bought my size rather than the one larger the supplier requested and am very happy with the result - probably not advisable if your not in reasonable shape or wearing as layers - in which case I would do as they suggested. Seems very well made, excellent value
Excellent quality for the price, I have the UA equivalent to compare with which is slightly more comfortable but also 3 times the price. Just be mindful that this is compression gear so it will be tight.