Knit a slim simple phone sock cover in the round. You only need a small amount of 4 ply or sock yarn - great for leftovers.

Pattern originally designed for the iPhone 12 Mini, but can be easily adjusted for any phone. Suggested stitch counts are provided for several phones.

Stitch gauge is 3 stitches per cm (15 stitches per 5 cm).
Row gauge is not important as you just knit until the height of your phone.

You may need to change the needle size to get gauge. For example, I used 2.25mm needles with Drops Fabel but 2.5mm with Scheepjes Our Tribe.

Alternatively, you can adjust the number of stitches instead.

The cover characteristics will also vary with the yarn choice.
I found Scheepjes Our Tribe soft & plump with a woolly haze that can fuzz a bit with use. Whereas Drops Fabel produces a harder, finer cover without any fuzz .