There are several fractal curves associated with Sierpiński. The above curve is one example, and the Sierpiński arrowhead curve is another. The limit of the curve illustrated above has area
The area for a related curve due to Sierpiński (1912) illustrated above is
(Steinhaus 1999, pp. 102-103; Cundy and Rollett 1989; Wells 1991, p. 229).