I designed this for the "Loop Quiet" ear plugs which are made entirely of silicone, so the snug fit is acceptable,

I've now added a version for the loop switch earplugs also. to make the case nice and compact I have used only 4 magnets, if you find this to be too weak, I can probably make a slightly bulkier version for more magnets or larger magnets.

I also personally decided to cover the case i use in leather and attach each side to a key chain with small jewellery screw eyes, as shown in some of the pictures (they screw into the corner area beside the magnets, where the case is a little thicker).

• loop plugs are held firmly bit interference fit in bottom half.
• uses 6x 3mm x 3mm round neodymium magnets.
• may require support, might make a non rounded version in future.