cost of 1st class stamp?

best answer
First-Class Mail ® service is an affordable and easy way to send envelopes and lightweight packages. First-Class Mail Forever ® stamps cost $0.60 (the current 1 oz price) and will never expire even if the First-Class ™ postage rate goes up. For packages (up to 13 oz) prices start at $4.80. Buy Stamps First-Class Mail Prices