No problems really with my nose.  I usually forget I have it until someone asks or it's piercing-cleaning-time.  Mine is really small.
I've never heard of that before.. bigger nipples so you need a bigger needle?  People who have more fat on certain parts, do they use a bigger needle for them?  Outfreakinrageous!  But hey, I could be wrong?
oo lala, i want these.. but as my good friend just asked, 'why would you want to shield your nipples?  Are they going into battle?' hahaha
Oh yeah, I have my tongue done too I forgot to add that.  Sometimes I lose track of all this shiz.