This is a laptop cover with a cable motif on the front and additional cables around the back. This makes it a decorative knit while still being easy to follow.

The pattern is provided in one size which is stretchy enough for a range of sizes but can easily be adapted for different laptops.

I have a fairly tight gauge so going down a needle size might be appropriate.

My yardage estimates are based of my own sample knit which was just under 370 yards. I would recommend a single colour yarn or tonal as the cables will likely be lost in yarn with too much variegation.
I used malabrigo rios yarn which has good stitch definition and is superwash.