Index Card Accessories for Note Taking on the Go

Index Card “Notebooks”?

Before I go the DIY route, has anyone seen gummed 4 x 6″ index cards available for sale? I’d love to have a bunch of index cards temporarily glued together almost in notebook form for easy use and portability.

I’m looking for something along the lines of traditional note pads or memo pads like this: but which used a thicker index card stock.

I know there are a handful of manufacturers who make spiral bound versions with perforations for tearing cards out, but I’m looking for something a tad less bulky for putting in a back pocket or jacket pocket. I’ve also considered using binder clips and even book rings, but again, I’m trying to slim the system down.

If there’s nothing great, I may just go with my favorite cards and DIY with some PVA Glue which is often used in book binding and is suggested frequently in crafting videos like: In the end, this may be the best route to allow me to choose my favorite cards in addition to how thick I can make the “notebooks”.

Note card cases, folios, and holders

Similar/related/useful things I’ve come across in this related space:

Kaitiaki 3×5 Inches Index Card Organizer, though they don’t seem to have anything for 4 x 6 inch index cards.

Rite in the Rain (zettelkasting in the elements while hiking anyone?), though they all appear to be designed around 3 x 5″ cards.

Oxford At-Hand Note Card Case, this could work, but as ever, it only seems to be available for 3 x 5″ index cards

YOAVIP 4×6 Index Cards Clear Plastic Holder looked interesting, but was a larger, notebook sized version, though still had some useful portability features, yet might be a bit persnickety for regular in-and-out usage.

Other ideas?

Has anyone else done this or anything similar? How about wallets, folios, or thin covers? What’s your experience?

Update

This is ultimately what I ended up doing:

A notepad for my Zettelkasten! 🗃️
30 index cards, some bookbinder’s (PVA) glue, a brush, some clips, and ten minutes of craft time. We’re ready for the road…