7 Diamonds Men's Size Guide Sharp style begins with a striking 7 Diamonds® shirt. Crisp cotton fabrication. Textured placket provides a modern look to your, already, stunning attire. Point collar. Long sleeve, button-up shirt. Single-button mitered cuffs. Straight back yoke. Shirttail hemline with branded side gussets. 97% cotton, 3% Lycra®. Machine wash cold, tumble dry low. Imported. Measurement..