If it feels fine kicking, you should be fine. A quarter of my bootie hangs out my Jet fin (much more than what you have). On the other hand, my whole bootie sits about 0.5cm into my Scubamax Aero fin; which means I have to tighten the straps down to the brink.
I think it looks fine to me and the Tusa size chart says so too.
What you don't want in a fin is too little bootie sticking into it, such as up to the balls of your feet (your toe joints). You'll get feet cramps from having to bend your toes to get leverage in your fin kicks.
You also don't want to have too much bootie into the fin. You won't be able to tighten the straps enough, or find spring straps that fit.