I thought I would give it a try and the book I have is all garter stitch for modular knitting and wondered if there is a reason. So the yarn I was using looked so much nicer in a stockinette stitch but as I worked the square it ended up a diamond shape rather than a square. There has to be some mathematical reason for this....I just never gave it a thought till now. Can you knit a square starting with one stitch and doing an increase so you get a perfect square diagonally. ...(doing an increase on each end is making my square elongated like a diamond.