I've wanted to get my nipples pierced for ages, but these stupid boy nipples have just always been too small

I know that there's going to be quite a stretch of tenderness and sensitivity that's going to make the very idea of getting them pierced enough to damn near give a lady the vapors, but in terms of growth, is there a general time frame for when nipple size will sort of cap out? And have any other girls had experience with getting piercings after starting HRT? About how long did it take before you could even consider the notion?