These are end caps for Ikea MOSSLANDA picture shelves.  I need more storage for my tiny kitchen, and I need storage bigger than the typical spice rack but not for things that are big like pots.  I have many creative locations on walls, but they are all custom sizes and don't work well with any shelves you can buy.

Ikea sells lengths of picture shelves that fit the bill for about $4usd, and they cut down nicely so they are almost the perfect medium for some creative Ikea hacking.

These are end caps that allow you to use these shelves without fear of anything falling off the end.

Print them out of whatever you want, and print every other mirrored of course. 

Attached is the fusion file if you want to make them fancier... my wife didn't like anything that didn't look industrial so I didn't attempt anything artistic.