19" Armpit to armpit. The Vintage Y2K Wckd Authentic collection Short Sleeve White Graphic T-Shirt in size M is a stylish and nostalgic addition to any man's wardrobe. Made of comfortable cotton knit fabric, this shirt features a crew neckline and a regular fit, perfect for everyday wear during the summer, fall, and spring seasons. The Y2K theme adds a unique and vintage touch to this easy-care shirt, which is machine washable for added convenience. With its classic design and quality brand, this T-shirt is a must-have for those looking to add a retro flair to their look.