Sierpinski Arrowhead Unisex T-Shirt — Black & White

One unbroken line that draws Sierpiński’s triangle.

Take a straight line and replace it with three shorter ones, bent at sixty degrees like the first strokes of a zigzag. Do the same to each of those, turning alternately left and right, and keep going. The line never crosses itself, yet as the steps go on, it threads through every corner of Sierpiński’s triangle: the same lace as the rest of our Sierpiński range, but this time drawn in a single stroke.

It sits between a line and an area. Its fractal dimension is about 1.585, the same as the triangle it traces: more than a curve, less than a solid shape.

This print draws the line at several depths at once, so no two patches are the same.

Who it’s for

Fractals do real work: antenna engineers use Sierpinski shapes to make one antenna work across several frequency bands, and programmers meet the triangle as the classic lesson in recursion. A subtle nod for electrical engineers, software developers, computer scientists and math teachers.

Made to be noticed: a bold print in a relaxed unisex cut, for conferences, concerts, weekends, and anywhere a good conversation might start.

The Unisex T-Shirt

• Lightweight polyester with a soft, cotton-like hand. Quick-drying, relaxed unisex fit: size down for a closer fit.
• Wash by hand or on a gentle cycle. Hang to dry, no bleach, cool iron.
• Not quite the right fit? Tell us within 30 days and we’ll make it right.

Size guide

Measurements around the body, in cm (inches). Allow 1–3 cm either way.

Every Zenzicube design is grown from a real piece of mathematics. Find more in the Mathematical Menagerie.