I'm currently testing out Bateman and BW 3-under tabs. Both a size "L"
Of the 2 the BW tab is bigger by enough that I can't get to my "tooth" anchor point, so, like others have already suggested, I'll be trimming it back.
The instructions from an Elite tab I tried mentioned using talc on the tab when shooting, and that after some shooting the "amount" of tab that is touching the string on release should become "outlined" and that this "outline" may guide how much you can trim it back. Never tried it myself, but sounded like an idea.
Henrik