How many stamps do i need to mail out something from VA to CA?|136765

I_m mailing out some stuff and i live in Virginia and it needs to be send out to California. I put it in those brown/yellow envelope (manila envelope) and i folded it in half because i ran out of the regular size one. Its not heavy, i just put three papers and a bracelet.How many stamps do i need?

You need to have it weighed at the post office.