Small indeed; backs get loose
I bought them for day to day and to sleep in them at night.  They come with an alcohol pad.  Two types of backs were included, plastic type and screw on;  plus also some small black disks.<br /><br />After sleeping in them, they are fine for sleeping in, no pains or bothers.  Most important though, you must check the screw on back daily as they tend to come unscrewed. Have not used the other closer. Still not sure what the other disks are for.<br /><br />Giving it a 4/5.  (MY RATE SCALE: 5=perfect; 4=minor imperfections; 3=likely wouldn’t buy again; 2= too many problems; 1= shouldn’t be sold or dangerous).
Rating: 3 stars