I also use the 12x12 from Pioneer!!! I got 2 huge mega packs from JoAnn's when they were 50% off!!! They are normally like $9.99!!!
Now I'm not sure how they (the actually page protectors) will fit in a post bound book or the strap hinge kind but they are just a tad snug in my XL Pioneer 3 ring binder!! But nothing that just a tad extra care turning the pages doesn't solve!!!
