Personalized Petroleum Engineer (Worlds Best) Long Sleeve T-Shirt. Petroleum Engineer Long Sleeve T-Shirt - Vintage Royal Blue engineering job shirt has a white and blue worlds best logo, a nice present for a thank you appreciation gift. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL