OPT STP T-shirt by Single Block Clothing
• 100% ring-spun cotton
• Sport Grey is 90% ring-spun cotton, 10% polyester
• Dark Heather is 65% polyester, 35% cotton
• 4.5 oz/yd² (153 g/m²)
• Shoulder-to-shoulder taping
• Quarter-turned to avoid crease down the center
• Blank product sourced from Bangladesh, Nicaragua, Honduras, Dominican Republic, Haiti or Guatemala
Disclaimer: Due to the fabric properties, the White color variant may appear off-white rather than bright white.
This product is made especially for you as soon as you place an order, which is why it takes us a bit longer to deliver it to you. Making products on demand instead of in bulk helps reduce overproduction, so thank you for making thoughtful purchasing decisions!
Age restrictions: For adults
EU Warranty: 2 years
Other compliance information: Meets the flammability, lead, cadmium, phthalates and formaldehyde level requirements.
In compliance with the General Product Safety Regulation (GPSR), Oak inc. ensures that all consumer products offered are safe and meet EU standards. For any product safety related inquiries or concerns, please contact us at alex.oak@company.com or write to us 123 Main Street, Anytown, Country.
Size guide
| LENGTH (inches) | WIDTH (inches) | |
| S | 28 | 18 |
| M | 29 | 20 |
| L | 30 | 22 |
| XL | 31 | 24 |
| 2XL | 32 | 26 |
| 3XL | 33 | 28 |
| LENGTH (cm) | WIDTH (cm) | |
| S | 71.1 | 45.7 |
| M | 73.7 | 50.8 |
| L | 76.2 | 55.9 |
| XL | 78.7 | 61 |
| 2XL | 81.3 | 66 |
| 3XL | 83.8 | 71.1 |
Discover Single Block Clothing’s premium unisex T-shirts, where Canadian streetwear meets comfort and durability. Made from 100% cotton and quality blends like Sport Grey and Heather, our tees offer a sleek fit, taped neck, and double-seamed hems for a clean, long-lasting silhouette. With a fabric weight of 5.0–5.3 oz/yd², each shirt feels substantial yet breathable—perfect for everyday wear.
Each piece is printed using high-quality DTG printing, turning every T-shirt into a bold expression of individuality. Whether you're repping edgy designs like “SKULL MACHINIST” or rocking minimal classics, our OEKO-TEX certified fabrics and sustainable approach ensure comfort with a conscience. Designed in Canada, our shirts are more than just wardrobe essentials—they’re a statement of style, identity, and self-expression.