How to Crochet Arched Square Diagram ~Free Crochet Pattern. In this pattern, I am using US crochet stitch abbreviation. Crochet Materials Crochet hook size 4.0 mm. Crochet yarn 4 ply 100 % Acrylic: Blue. Sewing needle. Crochet Square Instructions This pattern uses UK stitch abbreviations. Crochet 8 chs, sl st in ch 1 to form […]