Presenting a romantic pair of couple rings crafted to symbolize unity — the Heart Lock Couple Rings. Each ring features a delicate open-heart motif paired with a small rectangular lock pavé, designed to nest together visually when worn as a set. These models were built with jewelry production and 3D printing in mind: clean topology, accurate proportions, and a balanced design that works beautifully in gold, silver, or resin prints.

Both male and female versions are included and optimized for direct use with SLA/Resin printers and for jewelry casting workflows. The STL files are fully watertight and ready for slicers; the 3DM files contain the original NURBS surfaces so jewelers or CAD artists can make precise alterations. Whether you sell as a romantic pair, gift to newlyweds, or use them for custom orders, these rings offer a stylish and manufacturable solution.

What you get in this package:

High-quality, print-ready STL files (watertight, manifold) for both rings.

Editable 3DM files (NURBS) for precise resizing, detailing, or client customization.

Clear naming and organized files so you can find sizes and variants quickly.

Support notes with printing and casting tips to help you achieve the best finish.

Files are provided only in STL and 3DM formats (no OBJ / FBX / STEP). If you need other formats or custom resizing, see the Customer Support section below.

Key features

Interlocking heart-and-lock couple-ring design.

Jewelry-ready geometry with smooth fillets and balanced proportions.

Watertight STL files suitable for direct 3D printing (SLA/DLP/FDM prep).

Editable 3DM (Rhino NURBS) for accurate resizing and production adjustments.

Optimized for casting and printing; minimal cleanup required.

Clean layer orientation and recommended print directions noted.

Separate files for each ring (his & hers) and combined presentation renders.

Files included

HIS_RING.stl (watertight, printable)

HERS_RING.stl (watertight, printable)

HIS_RING.3dm (NURBS, editable)

HERS_RING.3dm (NURBS, editable)

READ_ME.txt (contains units, print tips, and recommended scale)

Note: Only STL and 3DM files are provided. Conversions to other formats are not included.

Printing & casting tips

Use supports on overhangs for SLA; orient ring so heart-lock faces upward to reduce support scars.

For metal casting, print in high-resolution resin to reduce cleanup and retain pavé detail.

When resizing, edit the 3DM file to scale the shank; do not uniformly scale the pavé area—maintain stone hole sizes if you plan to set stones.

Customer support

I provide resizing service (custom sizes) for an extra fee — provide finger circumference or inside diameter in mm.

I can prepare additional file formats on request (paid): OBJ, FBX, STEP — contact me if needed.

Reply to this listing or message me with your print/cast workflow and I’ll give quick tips specific to your process.