Hi. This is Selma Sue, from Massachusetts.
In regards to your question, these envelopes will not only hold 8.5 x 11 paper. I use them to store all the things I will need for the future projects I have designed in my head along with a drawing. I usually take an afternoon and set them up, then when I'm ready to make the project I just grab the envelope and get started.
I hope this helps.
Good luck, Miss Selma Sue
By: miss sue