Regardless of the method that you choose to resize your sock, you’ll need to work out the details for the heel and the toe. Honestly, the easiest way to do this is to grab another pattern that you already have in your library and follow those instructions. As a general rule of thumb, a heel flap contains the same number of rows as it does stitches rounded up to an even number. When determining the number of stitches to turn the heel, there is some math involved. Rather than reminding everyone of high school algebra, I’m going to refer you to Cookie’s Sock Innovation. It’s somewhat ironic that I suggest this book since all of the patterns are written for one size. That said, Cookie provides a tremendous amount of material in the beginning of the book for resizing sock patterns. She also includes a table that you can use to rework the heel turn.
The general rule for short row heels is to divide your stitch count roughly by 3. One-third of the stitches will appear on the right side of the turn, one-third on the left, and one-third on the right.
Resizing toes are fairly straightforward. You need to decrease by 4 stitches every other round until you have one half the number of stitches that you started with. I like to add three additional rounds where the stitches are decreased on each round. It’s not a requirement, but it does mean fewer stitches to kitchener.
Someone mentioned in the comments, Charlene Schurch’s Sensational Knitted Socks. This is the first sock book that I ever bought, and I also have the follow-up More Sensational Knitted Socks. Even if you don’t use any of the charts that she provides in the books, she provides heel and toe instructions for both cuff down and toe up.
Lastly, the Wendy Knits blog includes some free patterns for vanilla toe up socks. She provides three types of heels (slipped stitch, short row, and the gusset heel). If you are resizing a toe up pattern, you can substitute Wendy’s toe and heel instructions from the vanilla patterns.
This wraps up my series on sock resizing. I hope it was helpful. Feel free to add any additional tips in the comments.
I’m also happy to say that I’ve finished the last of my stealth projects (for now at least). This has allowed me to make some serious progress with Ellington.