The Phi Cowl is inspired by the book The Golden Ratio: The Story of PHI, the World’s Most Astonishing Number by Mario Livio. The golden ratio (phi, ϕ, or Φ = ~1.6180339887498948482) is the ratio between the width and sides of a pentagon, and the ratio is evident in many geometric shapes and numbers in art and nature. For example, knitters often use the Fibonacci sequence to create stripes, and the ratio between adjacent Fibonacci numbers is Φ.
Finished Size 53″ outer circumference, 19″ neck opening, and 6″ wide.
Yarn Manos del Uruguay Franca (100% superwash merino wool; 114 yd [104 m]/5¼ oz [150 g]): #F14 Esmeralda, 1 skein. Yarn distributed by Fairmount Fibers.
Needles Size 13 (9 mm). Adjust needle size if necessary to obtain the correct gauge.
Notions Tapestry needle.
Gauge 10 sts and 16 rows = 4″ in St st.