Small single pair sunglasses/glasses holders that fits x3 small 6mm diameter x 3mm thickness magnets. I designed this to hold my sunglasses in my Ioniq 5 which features a magnetic plate next to the driver but it would work for any magnetic surface.

I have also attached my fusin 360 file that has editable parameters for easy customisation and will allow you to customise the holes to suit your own magnets.