My take on a simple handle cover.
You can change the size by either increasing/decreasing the amount of single crochets inside your magic circle or increasing/decreasing the amount of rounds you do.
No specific gauge, just make sure the work is tight so that heat does not escape as much.

Please only use cotton yarn, as normal acrylic will melt due to the high temperatures.

To make the color mixing I made, use two different color balls of yarn at one time. If that’s not your style, feel free to use two of the same color to make a solid colored cover.