From 9396505c5de20c862416d09fdd82eba8e63e858e Mon Sep 17 00:00:00 2001 From: Zachary Vance Date: Sat, 12 Apr 2025 11:07:55 -0400 Subject: [PATCH] posts/3ring.md --- posts/3ring.md | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 posts/3ring.md diff --git a/posts/3ring.md b/posts/3ring.md new file mode 100644 index 0000000..2f91244 --- /dev/null +++ b/posts/3ring.md @@ -0,0 +1,35 @@ +--- +author: admin +categories: +- Non-technical +date: 2025-04-12 +tags: +- standards +- organization +title: '3-ring binder spacing' +--- + +I recently tried to buy a 3-ring binder, and I was annoyed didn't list spacings on paper OR binders. This is my attempt to write a reference for future searchers. + +The spacing between rings seems to be standard. The ring size itself isn't standard. Holes vary from 6-8mm. + +Here are the spacings I found. If you encounter a 3-ring binder not listed, or pre-punched paper that doesn't match the below, please email me with the measurements and brand name. + +Paper sizes: +- **US Letter**: 215.9x279.4 mm / 8.5x11 inch +- **A4**: 210 x 297 mm / 8-1/4 x 11-3/4 in +- **A5**: 148 x 210 mm / 5-7/8 x 8-1/4 in +- **A6**: 105 x 148 mm / 4-1/8 x 5-7/8 in +- **Filofax** (brand name): 95x170 mm / 3.75x6.7 inch +- **SMD parts sheets** (unclear if standardized): 117x175 mm; A6 6-ring spacing + +**US Letter, 3-ring**: Aka "standard" 3-ring binders in the USA. + - 108mm hole spacing +**A5, 3-ring**: In Staples, I found these sold as "mini" binders. + - 70mm hole spacting +**A5, 6-ring**: + - 19mm hole pitch, 70mm central gap +**A6, 6-ring**: + - 19mm hole pitch, 40mm central gap +**Filofax, 6-ring**: + - 19mm hole pitch, 50.8mm central gap -- 2.47.3