Ones in stock are made specifically for 14” long rasps, 6 or 8 teeth wide.
 
I’m not a farrier for other peoples horses, just our own but I trialed these covers with my own rasps and it is working well. It just helps keep the rasp teeth from getting damaged by the other tools in my hoof care tote and helps keep it from getting rusty from moisture. Also helps you keep from skinning yourself on the teeth while it’s not actually in use.