This size fits common "cigar tube" packages, such as [my 3d Printer nozzle cleaning kit,](https://amzn.to/3s5xctU) which are about 25mm in diameter. Many thanks to user brian.kerley for his excellent[ Gridfinity Hole Customizer](https://thangs.com/designer/brian.kerley/3d-model/Gridfinity%2520%257C%2520Hole%2520Customizer-62607)