Editing Loose leaf (section)

== Loose leaves in countries that use Letter-sized papers ==
In U.S. and Canada, [[Letter (paper size)|Letter]]-sized papers (8.5 x 11 inch) are used, and paper sizes are based on inches. The loose leaves in these countries have three punched holes on the left side of a paper, and the distance between two adjacent holes are set. The loose leaves may be exactly Letter-sized or smaller. Five Star sells Letter-sized loose leaves; Oxford and Mead sell 8 x 10.5 inch loose leaves. In libraries and print shops, [[hole punch]]ers are regularly provided for punching 3 holes.

Some bound notebooks have perforated lines for tearing off pages, and all pages have pre-punched holes, so that when torn off, they can be organized into a binder directly.

=== Discbound loose leaf systems in North America ===
[[Staples Inc.|Staples]] and [[Office Depot]] produced "discbound" loose leaf systems: ARC and TUL, respectively, and sell them both in stores and online. Both are available in the US, while in Canada, mainly the Staples ARC system is available. These two systems sell products based on [[Letter (paper size)|letter]] and junior (5.5 x 8.5 inch, which is half of letter size) sizes. They sell "narrow-ruled" (whose line height is approx. 6&nbsp;mm or 1/4 inch) loose leaf paper, which is rare for 3-hole letter size papers. They sell "binding discs" of sizes of 1 inch and 1.5 inch. There are also third-party manufacturers of TUL system components.

Some smaller manufacturers also sell discbound systems. For example, Levenger sells a discbound system called "Circa" (the Levenger Circa® Notebook System).