Star Wars Boys T-Shirt Ages 8-20 BB8 Atmosphere 50% cotton Star Wars Boys T-Shirt Ages 18-20 BB8 Atmosphere X-Large Charcoal 50% Cotton, 50% Polyester Crew Neck Short Sleeves Size Chart: Age 8 (Small), Ages 10-12 (Medium), Ages 14-16 (Large), Ages 18-20 (X-Large)