2 things you can do, you can trim the tape down some, just cut small amounts off at a time so you don't take off too much. They are made to do that cause everyone's mouths are not the same size. The other thing is to make sure you buy youth or small frame calls. They are made for people with smaller palates. You may have to try a couple brands and find which one fits your mouth the best. I know HS and Quaker Boy and I believe Primos make the small frame calls. If they are too big you can trim those down too.
Good Luck to you.
Ticklish Tom Custom Calls Prostaff
See who gets the last laugh