Answer:
What can be any size or shape and gets bigger the more you take from it?
I can be found in seconds, minutes and centuries, but not in days, years or decades.
Sitting down you have it, Standing up you don't.
I shave several times a day, yet I still have a beard. Who am I?
What can you easily break but never touch?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.