Depends what uve got to start with hun. If u are fairly flat chested highs will probably suit you more and give u more projection. I had lows as I had d cups to start with and highs wouldn’t have filled them out enough xx
The usual rule us high profile are for narrow chested girls and low profile are for broader, this isnt always exact but high profile also tend to give a faker look than low due to higher having bigger projection xx
I’m only a size 8 with a 29 inch under bust and I had lows mine have a fair but of projection too really depends on what your surgeon recommends for u. Everyone is so different no 2 girls will look same with same implants and profiles etc. good luck deciding!! Xx