ASSASINN'S CREED IV BLACK FLAG GRAY HEATHER COLOR LICENSED T-SHIRT Assassin's Creed IV Black Flag Gray Heather Color Short Sleeve Licensed- Authentic Men's T-Shirt - 90% Cotton & 10% Polyester Color: Gray Heather Shirt Specific Dimensions (inches) Size Width Length Small 18" 27" Medium 20" 29" Large 22" 31" X-Large 24" 32" 2X-Large 26" 33" 3X-Large 28" 34" Doubling the width measurement will give you the chest size.