Go to the USPS website.
Postage would be $2.27 for 5 oz. package to Canada.
How much postage is required for a 6x8 inch card? It weighs less than 1 ounce.
That would depend on the weight of the letter. Postage is 42 cents per ounce, with each additional ounce requiring more postage. Your local post office can weigh it for you. Or if you have postal scales you can weigh it, then call your post office, tell them how much the letter weighs, and get them to tell you how much postage it will need.
It depends on the weight of the package or envelope. Letters weighing one ounce or less require a 49 cent stamp called a "forever" stamp.
17 cents
20 cents
DependS on the weight of the package.
It depends where from and how much the package weighs
Domestic postage is $1.39 for an ordinary envelope of uniform thickness.
No answer? Blank.
Postage machines will weigh the precise weight of your package, right down to the ounce, and allow you to add the perfect amount of postage. On the other hand, if you choose to use stamps, you are mostly guessing your cost and may waste stamps or even add too little postage, causing the parcel to be redirected to you.
The postage is standard first class 1 ounce (a "Forever" stamp).