The mitered (or mitred) square block is formed such that there's a diagonal lined running from corner to corner. Each row looks like it "turns the corner" along this diagonal. There are many variations on the mitered square, but the one we've chosen for our afghan uses increases -- specifically yarn overs -- on every other row.
Mitered Square afghan block:
Size US 8 needle
Please use a slip stitch edge. An easy way to do this is to slip the first stitch of every row purlwise with yarn in front, then bring the yarn to the back to continue knitting the row. (You can learn more about slip stitch edges here.)
Row 1: k1, pm, k1, pm, k1
Row 2: k1, yo, sm, k1, sm, yo, k1
Row 3: knit across
Row 4: knit to first marker, yo, sm, k1, sm, yo, knit to end
Row 5: knit across
Repeat rows 4 and 5 until the piece measures 8" on a side (approximately 25 repeats).
Bind off loosely.
Weave in ends and block to 8" square.
- Your block might look more like a kite when you cast off. This is okay, and I might say even normal. Blocking helps, and so does sewing these squares together into a larger project, like an afghan.
- One benefit of using increases to create a mitered square is that you can keep knitting until it's the size you need.