Just a Vent

Why is it, that I can buy a 12x12 scrapbook/album, 12x12 refill page protectors, and a package of 12x12 colored paper.....and the colored paper does.not.fit in the page protectors??? grrrr. Of course, I discovered this after I completed 3 or 4 pages. I'm going to have to take the paper cutter and trim about 1/4 inch off of every piece of paper I use. :-p