If you don't know what it means....well you probably don't need this shirt. Hint - It's my favorite unit of measurement!
The shirt: Dark heather grey with white ink. Super comfy featuring a uniquely soft triblend fabrication, modern fit, crew neck and short sleeves. 4.3oz 50% Poly 25% Combed Ring-Spun Cotton 25% Rayon.
The 4XL & 5XL are a 100% cotton shirt that is more heavyweight.
If in doubt, go a size larger. You're gonna eat more BBQ anyway!