1.3 ounces postagefirst class postage rate per ouncecost of first class postage per ounce1st class postage per ouncefirst class mail rates per ouncefirst class mail one ounce1 ounce first class mail package1 oz first class postageusps cost per ounce first classpostage for 1.5 ounce letter1st class postage 2 oz1 oz first class forever stamp
