I cut off the GILDAN tag because it was bothering me when I was wearing it, but it's definitely a GILDAN M size. It's a thick fabric, so I think it will be a useful item for the coming season. Measurements (laid flat): Shoulder width: Approximately 50 cm Body width: Approximately 49 cm Back length: Approximately 68 cm Thick fabric Please allow for some error as these measurements are approximate. I liked this plain black T-shirt because it goes with anything. Please read my profile and understand before commenting or purchasing. Thank you.