https://www.levenger.com/products/vintage-library-catalog-cards-set-of-50?variant=43444256243861

These don't have the pre-drilled holes, but at least are still offered, though at the price gouging cost of $14.50 for 50 (in 2024).

Cost per card: $0.29

https://www.levenger.com/products/card-catalog-box?variant=43007544066197

A bit on the small side, but has a built in pen holder:

https://www.demco.com/demco-reg-permalife-catalog-cards

The old school Library of Congress card catalog cards with the red ruling.

Ron White recommends taking notes on 3 x 5 inch index cards. One should place the Dewey Decimal or Library of Congress catalog number in the upper left of their bibliography card and in the upper right corner one should number their cards consecutively (1, 2, 3, etc.). White indicates the importance of these numbers is primarily that they are unique, presumably so one can refer to them or reorder them if they are put out of order. (p46-7)

https://web.archive.org/web/20060422014759/http://that4.2ch.net/test/read.cgi/stationery/1021438965/l50

https://web.archive.org/web/20060422014759/http://that4.2ch.net/test/read.cgi/stationery/1021438965/l50

the 2ch site that inspired Hawk Sugano's Pile of Index Cards method

ᔥ[[hawkexpress]] in How to link between Cards

https://www.maxtonandcompany.com/alfion

Maxton & Company also carries Notsu cards.

https://www.calendarsquick.com/printables/free.html

David Lynch described the method from Frank Daniel (1926-1996) of the American Film Institute and Dean of advanced film studies who taught students to plot out their screenplays using 3 x 5" index cards. One would write out a total of 70 cards each with scene headings. Once fleshed out, one would have a complete screenplay.

via https://www.youtube.com/watch?v=yngWNmouhP0

I have run across Jeff Shelton's Analog system (originally via Kickstarter) before. Thanks for the reminder.

There's also a slew of others, especially for folks looking at commercially preprinted cards (though I tend to think they're overpriced compared to blank cards): - The Hipster PDA (Parietal Disgorgement Aid) https://web.archive.org/web/20040906150523/https://merlin.blogs.com/43folders/2004/09/introducing_the.html - Pile of Index Cards (PoIC) https://www.flickr.com/photos/hawkexpress/albums/72157594200490122/ - Levenger https://www.levenger.com/products/triple-decker-pocket-planner?variant=42485422424213 (among others they carry including pocket briefcases) - Notsu https://notsubrand.com/ - Baronfig / Strategist: https://baronfig.com/products/strategist?variant=39787199529043 - Jeff Shelton's Analog system https://ugmonk.com/ - 3x5 Life https://www.3x5life.com/ - Foglietto https://www.nerosnotes.co.uk/collections/foglietto

Am I missing any significant or influential examples, particularly branded ones?

Hubnote for 3 x 5" index cards for productivity

https://notsubrand.com/

Notsu has a variety of 3 x 5" index card products for productivity and planning.

A statement of the common "one idea per card" (or per note). He doesn't state it, but links to an article whose title is "One Thought Per Note".

Who else has use this or similar phrasing in the historical record? - Beatrice Webb certainly came pretty close. - Others?

First reference I've seen for someone suggesting using half size 3 x 5" index cards so that they could use commercially available Magic: The Gathering (MTG) boxes.

Oxford and possibly other manufacturers already make 1/2 size 3 x 5" index cards.

https://www.attorneyatwork.com/analog-attorney-5-best-index-cards/

Article about general usefulness of index cards written by a lawyer and for them, though not specific to them as a subgroup.

Makes not of Nock's Dot-Dash cards which were apparently 3 x 5" dash gridded cards similar to Midori's grid notebooks. The website for the company is no longer active. Archived site: https://web.archive.org/web/20171007102414/https://nockco.com/paper/dotdash-3-x-5-note-cards

https://www.ebay.com/p/1154231946

https://www.imdb.com/title/tt1568150/

Based on having watched the documentary Joan Rivers: A Piece of Work and the depictions of Rivers' card index in the film and using her hands and a lateral file for scale, her cards seem to have been 3 x 5" index cards.

cross reference: https://hypothes.is/a/RvLTZjCQEe2uuaNwpTBNuA

A 9 x 5" card that folds in three to make a 3 x 5" card for planning out one's entire week.

This is quite clever with respect the space of cards like Analog and 3x5 Life.

https://www.levenger.com/collections/notecards/products/perfect-timing-3-x-5-cards-90-cards?variant=42485738045589#

Slightly different than today/next/someday, Levenger sells 90 today/tomorrow/someday 3 x 5" index cards for $14.50 (or $10.00 on sale).

via: https://www.3x5life.com/collections/frontpage/products/3x5-life-system-with-mini-course

They apparently offer a mini course outlining the system.

One wonders how much "why" they offer?

https://www.3x5life.com/

Compare with other products in this category: - Analog (Jeff Sheldon productivity system) - Memindex - Bullet Journal - Frictionless Capture Cards - Pile of Index Cards

Frictionless Tools' Capture Cards were custom 3 x 5" index cards, printed in vertical orientation with a square grid pattern on most of the card. The top was usually split in half between equal grey and red rectangles for titles/dates/headings and a slightly thinner single long rectangle as a footer at the bottom.

Patrick Rhone indicates on 2018-01-24 that they had quit manufacturing them by that date.

http://www.shopbrodart.com/Library-School-Furniture/Adult-and-Teen-Furniture/Computer-Furniture/Card-Catalog-Trays-and-Cabinets/_/Brodart-Wood-Charging-Trays2/

Brodart Full-Length Single Charging Tray<br /> Full- length charging tray with 1,000-card capacity<br /> Price: $96.32

• Adjustable steel follower block with automatic lock
• Felt pads on tray bottom protect desktop
• Full-length charging tray for countertop use
• 4"H x 4"W x 16"D
• Holds 1,000 5"H x 3"W cards
• Includes antimicrobial finish
• Made in the USA

See also: https://hypothes.is/a/ao89RMQmEe2zIvsu3lf6kw for a smaller version

http://www.shopbrodart.com/Library-School-Furniture/Adult-and-Teen-Furniture/Computer-Furniture/Card-Catalog-Trays-and-Cabinets/_/Brodart-Wood-Charging-Trays/?q=tray&s=MToyNTY6NDo6Ojo6OjA6

Brodart Mini Single Charging Tray Mini single charging tray with 600-card capacity More Info Price: $76.76

• Adjustable steel follower block with automatic lock
• Felt pads on tray bottom protect desktop
• Mini charging tray fits on your lap
• 4"H x 4"W x 8"D
• Holds 600 5"H x 3"W cards
• Includes antimicrobial finish
• Made in the USA

This could be used for a modern day Memindex box for portrait oriented 3 x 5" index cards.

Memindex dimensions mentioned in a 1904 advertisement<br /> cards: 2 3/4 x 4 1/2 inches<br /> case: 2 3/4 x 4 3/4 inches

1930s Wilson Memindex Co Index Card Organizer Pre Rolodex Ad Price List Brochure

archived page: https://web.archive.org/web/20230310010450/https://www.ebay.com/itm/165910049390

Includes price lists

List of cards includes: - Dated tab cards for a year from any desired. - Blank tab cards for jottings arranged by subject. - These were sold in 1/2 or 1/3 cut formats - Pocket Alphabets for jottings arranged by letter. - Cash Account Cards [without tabs]. - Extra Record Cards for permanent memoranda. - Monthly Guides for quick reference to future dates. - Blank Guides for filing records by subject.. - Alphabet Guides for filing alphabetically.

Memindex sales brochures recommended the 3 x 5" cards (which had apparently been standardized by 1930 compared to the 5 1/2" width from earlier versions around 1906) because they could be used with other 3 x 5" index card systems.

In the 1930s Wilson Memindex Company sold more of their vest pocket sized 2 1/4 x 4 1/2" systems than 3 x 5" systems.

Some of the difference between the vest sized and regular sized systems choice was based on the size of the particular user's handwriting. It was recommended that those with larger handwriting use the larger cards.

By the 1930's at least the Memindex tag line "An Automatic Memory" was being used, which also gave an indication of the ubiquity of automatization of industrialized life.

The Memindex has proved its success in more than one hundred kinds of business. Highly recommended by men in executive positions, merchants, manufacturers, managers, .... etc.

Notice the gendering of users specifically as men here.

Features: - Sunday cards were sold separately and by my reading were full length tabs rather than 1/6 tabs like the other six days of the week - Lids were custom fit to the bases and needed to be ordered together - The Memindex Jr. held 400 cards versus the larger 9 inch standard trays which had space for 800 cards and block (presumably a block to hold them up or at an angle when partially empty).

The Memindex Jr., according to a price sheet in the 1930s, was used "extensively as an advertising gift".

The Memindex system had cards available in bundles of 100 that were labeled with the heading "Things to Keep in Sight".

Notice the 1 1/4" x 3" cards, 2 1/4 x 4" cards in addition to the 3 x 5" and 4 x 6".

Ronald Reagan used 3 x 5" index cards.

https://www.wsj.com/articles/david-rockefellers-famous-rolodex-is-astonishing-heres-a-first-peek-1512494592

Goitein's zettelkasten is comprised of about 20,000 3 x 5" index cards and 7,000 5 x 8" index cards.

Link to: https://hypothes.is/a/TEiQ5H1rEe2_Amfzi4XXmg

While not directly confirmed (yet), due to the seeming correspondence of the number of cards and their corpus descriptions, it's likely that the 20,000 3 x 5" cards were his notes covering individual topics while the 7,000 5 x 8" cards were his notes and descriptions of a single fragment from the Cairo Geniza.

https://www.govinfo.gov/content/pkg/CHRG-107jhrg96166/html/CHRG-107jhrg96166.htm

Frederic L. Paxson kept a collection of 3 x 5 " slips of thin paper that filled eighty wooden file drawers which he organized using topical-chronologic headings spanning 4639 BCE to 1949.

While he previously recommended using note cards of the same size, the examples in Goutor (1980) have 3x5" cards for bibliographic notes and 5x7" or larger cards for content notes. (p19, 21)

Is there a reason stated anywhere here for this discrepancy or change? One would ostensibly keep them in different places/sections of one's card index, but does the size difference help to differentiate the two to aid in sorting? Is the larger card intended to hold more long form writing?

Goutor is in Canada, so were 5x7" cards more common or standardized there in the late 1970s and early 80s?

A5 measures 148 × 210 millimeters or 5.83 × 8.27 inches, so is a bit larger than 5x7".

5x7" is a more standard photo size, so was this chosen as the result of storage options from the photography space?

5x7" is scantly available in America in 2022, but only from Hamilco. A few others make cardstock in that size but not specifically as index cards.

While it may be slightly more difficult to find larger metal/wood cases for the 4x6 or 5x8 cards, it's a minor nuisance and anyone who wants them will eventually find the right thing for them. Beyond this, choose the card size that feels right to you.

If you don't have an idea of what you need or like, try things out for 10-20 cards and see how it works for you, your handwriting size, and general needs. People have been using 3x5, 4x6, and even larger for hundreds of years without complaining about any major issues. If Carl Linnaeus managed to be okay with 3x5, which he hand cut by the way, I suspect you'll manage too.

Of course I won't mention to the Americans the cleverness of the A6, A5, A4 paper standards which allows you to fold the larger sizes in half to get the exact next smaller size down. Then you might get the benefit of the smaller size as well as the larger which could be folded into your collection of smaller cards, you just have to watch out for accidentally wrapping ("taco-ing") a smaller card inside of a larger one and losing it. I suppose you could hand cut your own 5" x 6" larger cards to do this if you found that you occasionally needed them.

For the pocketbook conscious, 3x5 does have the benefit of lower cost as well as many more options and flexibility than larger sizes.

At least commercial card sizes are now largely standardized, so you don't have deal with changing sizes the way Roland Barthes did over his lifetime.

My personal experience and a long history of so many manuals on the topic saying "cards of the same size" indicates that you assuredly won't have fun mixing different sized slips together. I personally use 3x5" cards in a waste book sense, but my main/permanent collection is in 4x6" format. Sometimes I think I should have done 3 x 5, but it's more like jealousy than regret, particularly when it comes to the potential of a restored fine furniture card catalog. But then again...

https://web.archive.org/web/20080412071219/http://eastgate.com/catalog/Briefcase.html

Eastgate systems used to make a "3x5 Card Briefcase" to capture short notes on the go which could later "be scanned or transcribed to Tinderbox."

Tinderbox was one of the first digital tools to be used in a way very similar to zettelkasten of old, particularly by academics, who are a large portion of their power user base.

https://web.archive.org/web/20140707053048/http://www.getfrictionless.com/products/capture-cards-red

Simple index cards, but sold with a purpose in mind: capturing notes!

One is reminded here of waste books and fleeting notes.

Image:<br />

The documentary Casting By (2012) shows casting director Marion Dougherty's 3 x 5" index card collection which she used for casting notes. In particular they show an example card for Dustin Hoffman with his details. In Hoffman's case, his card included the older telephone numbers with exchanges (EN2-6933 or Endicott2 6933), so these cards may have also served a contact purpose similar to more modern rolodexes. Different from them however, Dougherty's also included heights, credits, and other observations relevant to the casting process.

Screen capture from the movie

A benefit of 4 x 6" cards is that clippings and other items can often be more easily filed along with them as opposed to the smaller 3 x 5" cards.

Dow indicates in 1924 that 3 x 5" and 4 x 6" are both commonly had in a range of materials the US as well as boxes or cases to keep them in. He does mention that one can also cut their own paper, indicating that this is a possibility.