The plastic caps on the legs of my folding tables have worn away over the years so I threw together a quick model to slip on the end as new durable feet. Each table had a different diameter leg so I parameterized the model to make for resizing quick.  I printed this model in TPU for an easy snug fit and durability.

The attached f3d file is set up with parameters to allow for easy resizing. All you have to do is update the hole_diameter value and the rest will scale along with it.

  I print this in TPU on an Ender 3 S1 at 40mm/s 

Layer Height: 0.2mm

Infill: 20% grid 

Supports: no

I did print this with Cura's combing setting on to help avoid stringing