Tron Evolution Bike Rider Legacy Glow in the dark Licensed T-Shirt GT005MS3 Tron Evolution Movie Bike Rider Legacy Movie Glow in the dark WHITE Color Short Sleeve Licensed- Authentic T-Shirt - Men's T-Shirt -100% Cotton Color: WHITE - BRAND NEW Shirt Specific Dimensions (inches) Size Width Length X-Small 18" 25" 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.