Plait & Rib Cabled Notebook Sleeve

*DISCLAIMER: This is a beginner's first self-drafted pattern that was made for personal use and has not been tested. I have knitted it myself and troubleshooted it as far as possible, but there may be parts that could have been designed/knitted better. Please do let me know if you try it!* **Size:** This pattern makes a sleeve for a standard A6 sized notebook or pocket/mini 6 ring binder, but can be adapted for different sized books. * To add diameter/width, cast on more stitches in a multiple of 12sts + 3 sts. * To add height, add rounds of the 8-row cable pattern in Step 4. **Materials:** Wool is great for stretch, but a stretchy acrylic should work too.