This is sort of a long post....
I very often need to make 3" x 3" square envelopes for all of our 13 grandkids' cards. Decorative paper can be costly and I rarely find anything in my stash I'm willing to use for envelopes. I also don't like using copy paper for the envelopes.
I've always believed in supporting small town businesses to keep their doors open, and the folks at our small town newspaper, the Pioneer Press, go out of their way to keep their office supplies reasonably priced. After figuring in the cost of gas for my car, I now buy all my A2 envelopes and printer cartridges from them much cheaper than at the big box stores (and it's a drive of a few blocks rather than 225 miles!).
So, I asked Thomas at the Pioneer Press office if they sold paper heavier than copy paper. He pulled out a package of 24 lb. paper. I bought some to try it. When I got home, I discovered that 24 lb paper is bond paper, which we used as our letterhead paper in the law offices! It cut, scored and folded perfectly! So, I now have the perfect paper for envelopes. The 3" square envelopes ended up costing me 5 cents each (2 envelopes per sheet).
So, if you have to make small envelopes and prefer a nicer paper, try bond paper!
Thank you to Thomas and Dawn at the Pioneer Press office for always going out of their way to make my crafting affordable!