The size selection says "M" here, but it's actually size 165. This is because there isn't an option for that size. Also, the item condition is listed as "new," but I took it out of the bag once, although the shirt itself is new and unused. However, since it has been handled, please refrain from purchasing if you are sensitive to this. My child bought this and didn't realize the size was wrong until they took it out of the bag and unfolded it, just before they were going to wear it. I'm not very good at putting things back in bags neatly, so I'm offering it at a bargain price. It's a great deal, so please consider it. Please note that when shipping, I will take it out of the bag and fold it for shipping. ★ The collar will be kept in its original shape. This is a TOPVALU Select school shirt (long sleeve). A size 165 school shirt with improved antibacterial, deodorizing, and quick-drying functions thanks to special threads and processing technology. - Size: 165 - Material: 55% cotton, 45% polyester - Features: Antibacterial, deodorizing, quick-drying - Brand: TOPVALU - Series: SCHOOL COLLECTION