Its called a labret piercing. The time that you can leave the piercing empty varies from person to person.
a few hours
There isn't a way to tell :/
Mouth piercings are likely to close almost instantly once you take them out, no matter how long you have had them.
Well I'd Say A Day Or Two.
The length of time you have the piercing for will be three times that period for the piercing marks to close up and disappear.
It should take about a day i had mine for 2 months then took them out and they closed the next day
In About 2 weeks you can take it out...
You should go back to the shop you were pierced at. They may need to stretch or re-pierce your lip. Mouth piercings close very, very quickly once you take the jewelry out, no matter how long you have had them.
As long as the body takes to minimize the piercing and close it, there is no magic solution that will make it close faster. It's just a matter of time.
6~8 weeks
yes
i think a few weeks but no offence but lip peircings are stupid