A set of floor standing speaker stands for bookshelf speakers.

Uses two IKEA Adils legs that are $10ea. (here in CDN)

https://www.ikea.com/ca/en/p/adils-leg-black-70217973/

And you will need Ten, M3x10 or 12mm machine screws and washers. (5x per leg)

All the rest of the parts are threaded to screw together, no glue or anything required.

I printed the bottom feet out of TPU.

I also added some alternate top ‘feet’ if your speakers aren't close enough in dimensions to fit the retaining pieces I made.

My PolkAudio speakers are W-195mm x L-305mm.