Saw an outreach this morning from my neighboring state asking for people to print out ear savers for their staff. They had a request that the items be approximately 3″ in length. The ones I have seen are about 6″. I decided to do a quick markup of a smaller, more compact design on Tinkercad. It actually came out really well. The ender3 took about 26 minutes to print it, but it was pretty solid.
I was also thinking about people with smaller heads and also people that may not have elastic on hand to make their own mask. So the second design, MK2, has four holes that would allow someone to tie and knot the string through it.
Hope this helps out our first responders.
Mini ear saver MK1 used on homemade mask with rubber bands. 
MK1 Desgin 
MK2 Design 
Printing away
