This is an entryway sunglasses/glasses hanger. It can be mounted using 3M Command Strips. The back is hollow so different length Command Strips will work. The cavity width is 0.75 in (~19 mm). Make sure you have Command Strips that are no more than 0.75 in wide otherwise you will have to cut them to size.

This holder is meant to be used with the velcro-like Command Strips. If you want to use this hanger with the hook Command Strips, you will either have to double up, or use a shim to fill out the gap.

The hanger is designed to be flush-mounted.