The rings are too thick for multipurpose copy paper punched with a standard swingline 9/32 inch 3 hole punch

However, rings were thicker than I expected - makes flipping through a little more difficult as they barely scrunch through the hole punch.

When using standard 8.5X11" paper inside Avery plastic sheet protectors, the binder's covers are 1/2" too short - the long edges of the sheets stick out 1/2" because the sheet protectors add 1/2" where the 3 hole punches are located.

It has the pockets on the inside too if you want to secure something but don't have immediate use of a three hole punch.

The rings aren't standard for US hole punch.

This does not fit standard 3 hole punch papers

Once you print out over 300 pages and use a D-ring binder, you'll never want to go back to those clumsy O-rings again.