Crochet, Crochet Stitch Tutorials, How to Crochet How to Corner-to-Corner Crochet a Square (c2c) Learn how to corner-to-corner crochet a square with this photo and video tutorial. It covers how to read a c2c chart, increase, and decrease. beginner, c2c, corner to corner crochet, crochet, newbie, stitch tutorials