These page protectors do not hold 12x12 scrapbook pages, especially if you put any dimensional embellishments on your pages. I had to cut 1/4 inch off each of my pages just to get them to slip in the protectors and my pages still curled and buckled.
Love to take photos & create scrapbooks. None are real fancy but do use special papers, cardstock & stickers. All pictures since the 1960's are is scrapbooks & some of these books are a few inches thick so need extra pages all the times. Use to find these loading refills at local stores & love them as quality is good, not too thin & paper insert is included. My last sources have discontinued carrying this Pioneer product & other brands don't match the quality.
I started out with a Pioneer memory book years ago as my very first scrapbook. These refill pages are so easy to use and they fit perfectly. I have never had a problem with them. I would definately recommend them to others.