I have used these envelopes for years. They are perfect when one folds 8 1/2 x 11 papers. They fit perfectly. The little bit smaller size I also use and love them. I believe the the slightly smaller one only requires a regular stamp. I am not sure if the slightly larger one is the same with postage. I just sent something our in the larger one & I am testing the postage. It is over a week ago that I sent it out and have not received it back as of yet. That was my only question about the 6 1/2 x 9 1/2 size for postage. I will keep on it and hopefully it will only require one stamp. Theya re both perfect for me..
I love these small envelopes. This size gives me a little more room for whatever is going to be mailed. My preference is the 6 x 9 size.this .size only rquires a regular stamp on it No additional postage. the one that I purchased will require a little more money. the next time I go to staples I will get the 6 x 9 zise which is good for multiple mailings. I like to have both sizes. they are nice and sturdy and go through the systen with ease
I need this size of envelope to ship my book around. the main thing of this product is that this envelope is strong. I don't worry about any damage in the dilivery.
I love these I use them in my business as well in my hobby / craft needs they are just the right size and staples has the great price and they are delivered to my door for free!! love it!