Parametric Clip-On Shower Curtain Ring for Any Rod Size (Customizer: single or double hook)

Replacement shower curtain rings sized to your rod. Measure the rod diameter, enter it, and print as many rings as you need.

The ring is a C shape with an opening slightly narrower than the rod (snap_frac), so it is designed to clip on from the side and stay on the rod while still sliding along it. Below the ring is an open hook for the curtain, or two hooks (hooks = double) so the curtain and the liner can hang separately.

Rod size, clearance, opening, wall thickness, hook size and hook gap are all set in the OpenSCAD Customizer. Includes 5 ready-to-print versions for 19, 22, 25 and 28 mm rods (about 3/4, 7/8, 1 and 1-1/8 in).

Every part is a flat profile, so it prints lying flat with no supports.

NOTES AND LIMITS

- How firmly it clips depends on material and printer; test one ring on your rod first.

- For round rods only; measure the rod with calipers or a tape (circumference / 3.14).

- The curtain holes must be large enough for the hook (hook_id, default 10 mm, and the hook wall); measure your curtain's holes.

- Not for hanging anything other than a shower curtain and liner.

- Independently designed; not affiliated with or endorsed by any maker of the furniture, fixtures or hardware it is used with.

- Previews are computer renders of the included STL files, not photos of real prints. Each image is labelled "Rendered preview".

PRINT SETTINGS

- Material: PETG (as designed: tougher in a wet room and slightly flexible for the clip). PLA is not recommended in a hot shower.

- Layer height 0.2 mm; 3-4 perimeters/walls; 100% infill (the rings are small)

- Supports: none

- Orientation: as exported (flat)

- Bed size: every preset is under 60 x 60 mm, so it fits any common bed and a full set of 12 fits a 180 x 180 mm bed

- Print one ring first and try it on your rod; if it is hard to clip on, raise snap_frac (try 0.85) or reduce ring_wall; if it comes off too easily, lower snap_frac.

HOW TO CUSTOMIZE: install the free OpenSCAD (openscad.org), open the .scad, choose Window > Customizer, change the values, then press F6 (Render) and Export STL.

Designed with AI assistance: an AI assistant wrote the OpenSCAD code, presets and description under my direction. The files were checked automatically (watertight, correct size, prints without supports) but have not yet been test-printed. Preview images are computer renders of the STL files.

Licence: Creative Commons Attribution 4.0 International (CC BY 4.0). You may print, remix, share and sell prints and remixes, including commercially, as long as you give attribution (credit Doyle Pounders / Print File Foundry and link to this design).