Buy a size up, I wear large the first one didn’t fit me, I give it away the second one I bought it XL,it was perfect I will suggest buy a bigger size.Fit exactly no stretch. You can't put it in the dryer. It will not fit againThis is a pretty nice long-sleeve casual shirt for the $16 price. Weight is a little thicker than a regular T-shirt. It should work well on cooler days as we head into fall or as a base layer under a thermal or weather-resistant jacket. I weigh 160 pounds and size medium fits me comfortably. It is not as contoured as some other brands' "slim fit", but it is far from a baggy fit.I'll admit that I don't care a lot for "slim fit" shirts in the winter because I like to layer and I like loose, comfy clothing. I ordered a larger size than my "normal" size and it's great! If you order your regular size, it will fit nicely- but I wanted the room to wear a layer underneath and have plenty of room, but it does now have more of a loose fit. The quality is excellent, with quality stitching and very good quality fabric. The quality and comfort is better than I'd typically expect for the price. Would recommend!Hubs really likes the fit of this slim fit shirt (S). You can wear for casual, business casual...Really nice looking on and looks like a high-end shirt actually. Well made, no loose stitches, anythingI ordered this for my boyfriend because he likes long sleeve light weight shirts that can give him just enough warmth for fall and winter. Sweaters or cardigans are always too bulky for him so I knew he would like this one. This shirt is well made. It's lightweight and the pattern or fabric looks almost like it's a thermal. He is 6ft weighs 200 lbs and wears a size L. Runs true to size.My husband wears a L or XL. He has this in an XL and it fits perfectly. He's 5'11", 185bs, average build (for reference). Quality is really nice. No cheesy logos on display, either. The red, white, and blue stripe detail along the front buttons is a nice, unexpected detail. Would definitely buy this again.Amazing fit for my hubby who is 5’7 150lbs size Large.