My Triangle Knitting Project: Construction No.4 pattern is now available to purchase on our Online Shop, and WOOLI is back in stock. I'm so excited about this pattern, particularly because it has the free additional Annex to it, which is an extra pattern to creatively use more triangles, with an embellishment project making braids and tassels. Construction No. 4 garments require 15mm knitting needles, and the annex requires 25mm knitting needles to make.