How much postage for 9x12 photo mailer?

The postage for a 9x12 photo mailer typically falls under the first-class mail category. As of my last update, the cost for a first-class package weighing up to 1 ounce is around $1.50, but prices can vary based on weight and destination. It's advisable to check the current rates on the USPS website or use their postage calculator for the most accurate information. Additionally, consider adding tracking or insurance for added security, which may increase the total cost.