My usual size is XS but I got an XXS after checking the sizing chart and my measurements. I’m glad I did because it runs pretty large even knowing it’s intentionally oversized! Even then, I don’t have difficulty pulling my head over the neck hole since it had enough stretch and it’s really comfy! I love that they have embroidery backing/stabilizer under the shirt so the stitches don’t rub against your skin. Will definitely be wearing this often!