no, the piercing hole is too small.
When I take out my nose ring I cant even notice the hole.
Certainly. With time, the hole created from the piercing will heal over.
yes
The hole from a nose piercing would not be large enough for you to take in a sufficient amount of air if you were to plug your nostrils. Air will flow through the piercing hole but you will still need your nostrils in order to take in enough oxygen.
The size of a normal earing.
Everybody heals differently, but it is likely that you will be left with a little dot that will look like a slightly large pore.
month or 2
It leaves you with a more or less permanent hole. The hole can become infected or tear. Most people consider the piercing unsightly. It is generally not acceptable in a professional setting - interviewers will often rate interviewees for professional positions very low based on the presence of such a visible piercing. Small nose jewels look like a perpetual zit except up close.
the hole will close over or it could get infected
A three day old nose piercing will heal ok with a nose ring from Claire's even if the stud fell out. The curvature of the ring should make it impossible for skin to grow over the piercing. You should only be concerned about the piercing falling out as the hole will heal if it does. If you do attempt to change the piercing you should disinfect everything that will touch the wound to stop possible infection.
It is called a nose piercing.