This π-shirt features a logarithmic spiral whose radius grows by the golden ratio with every quarter turn. A clean and elegant design for those who see mathematics as beauty, proportion, and harmony.

• 100% ring-spun cotton for a soft, durable feel
• Heavyweight fabric (6.5 oz/yd² or 220 g/m²)
• Relaxed oversized fit with a vintage-washed look
• Designed for comfort, structure, and timeless style

Each item is printed on demand in order to minimize waste and maximize meaning.
 
Thanks for supporting thoughtful, math-driven design.

Age restrictions: For adults
EU Warranty: 2 years

In compliance with the General Product Safety Regulation (GPSR), Oak inc. and SINDEN VENTURES LIMITED ensure that all consumer products offered are safe and meet EU standards. For any product safety related inquiries or concerns, please contact our EU representative at gpsr@sindenventures.com. You can also write to us at 123 Main Street, Anytown, Country or Markou Evgenikou 11, Mesa Geitonia, 4002, Limassol, Cyprus.