So Mya just keeps growing and growing, and i love it

she is now 9 lbs! I was wondering, what harnesses do ya'll use?
I am struggling finding one I am completely happy with size wise....I ahve tried the step-in harnesses, now she is wearing a normal over the head harness that is a small (the thicker strap) becasue she grew out of her littler one!
Anyway, it can be from websites etc! Let me know!