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These 3.0mm – 3.2mm hotfix crystals from Preciosa® have no metallic foil backing, so light passes straight through the stone. That makes them the right choice for sheer fabric, mesh, and any design where a traditional foiled backing would show through. MAXIMA is Preciosa's premium rhinestone line, precision-cut in Europe for maximum brilliance and consistency.
Best for: sheer and mesh costumes, organza, tulle overlays, skating dresses, dance bodices with see-through panels, and any project where a foil-free, translucent look is needed.
Why You'll Love Them
- Crystal Unfoiled finish: No metallic backing, so the stone stays transparent from behind
- 12ss (3.0mm – 3.2mm) size ideal for outlines, accents, and medium-coverage designs
- Hotfix backing: Heat-activated adhesive for fast, clean application to fabric
- MAXIMA quality: Preciosa's premium European crystal line, precision-cut for maximum light return
- Consistent stones: Uniform sizing and shape in every pack, so no culling required
Size Reference
12ss rhinestones measure approximately 3.0mm – 3.2mm. This small size works well for outlines, accent rows, and medium-coverage patterns where a precise, clean look is the goal. To compare sizes, see our rhinestone size chart with ss, mm, and inches.
Packaging Options
- Available: 10 gross (1,440 pieces)
Crystal Size Reference Guide
| Stone Size (ss) | Size (mm) | Common Name | Best Use |
|---|---|---|---|
| 5ss | 1.7mm – 1.9mm | Extra Small | Fine detail, nail art |
| 7ss | 2.1mm – 2.3mm | Extra Small | Fine detail, nail art |
| 9ss | 2.5mm – 2.7mm | Small | Outlines, accents |
| 12ss | 3.0mm – 3.2mm | Small | Outlines, accents |
| 16ss | 3.8mm – 4.0mm | Mid-Sized | General coverage |
| 20ss | 4.6mm – 4.8mm | Most Popular | Dance and costume use |
| 30ss | 6.3mm – 6.5mm | Large | Bold accents |
| 34ss | 7.0mm – 7.3mm | Extra Large | Statement pieces |
| 40ss | 8.4mm – 8.7mm | Oversized | Maximum sparkle and drama |
| 48ss | 10.9mm – 11.3mm | Oversized | Maximum sparkle and drama |
Frequently Asked Questions
What does Crystal Unfoiled mean?
Crystal Unfoiled rhinestones have no metallic foil on the back of the stone. Standard rhinestones use a foil backing to reflect light forward. Unfoiled stones stay transparent, so light passes through rather than bouncing back. This makes them the right choice for sheer fabric, mesh, and see-through panels where a foil backing would be visible.
What is 12ss in millimeters?
12ss rhinestones measure approximately 3.0mm – 3.2mm. They are one of the smaller flatback sizes, well suited to outlines, accent rows, and coverage patterns where precision matters more than stone presence.
Are unfoiled rhinestones less sparkly than foiled?
Unfoiled rhinestones reflect less light than foiled ones because there is no metallic backing to bounce light forward. The tradeoff is intentional: unfoiled stones are chosen when transparency matters more than maximum reflection, such as on sheer or see-through fabric.
Browse our full Crystal color collection or shop all MAXIMA Crystals by Preciosa hotfix rhinestones.
