4mm Tungsten Wedding Band — The Filament
4mm Tungsten Wedding Band — The Filament
Measure the inside edge-to-edge of a ring you already own for the most accurate result. For wider bands (8mm+), sizing up is usually the safer choice.
Ring Sizing FAQ
We recommend sizing up. A ring that's slightly loose is more comfortable than one that's too tight, especially for wider tungsten bands.
Yes — fingers can swell slightly in heat and shrink in cold. Measure at room temperature, ideally in the evening when fingers tend to be at their largest.
Yes — wider bands (8mm and up) tend to fit more snugly than narrower ones at the same listed size. If you're between sizes and ordering a wide band, size up.
Yes — your first size exchange is free within 30 days of delivery. You cover the cost of shipping your ring back to us, and we cover the cost of shipping your correct size back to you. See our Free Size Exchange Policy for full details.
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A 4mm tungsten carbide wedding band with beveled edges and a polished finish, designed for men and women who prefer a slim, understated profile. The beveled edges frame the polished surface with a defined line, keeping the narrow band from looking flat or plain.
A Slim Profile, Fully Polished for a Refined Look
At 4mm, this band sits among the slimmer widths in our collection, and the high-polish finish holds its shine well since tungsten carbide resists the scratching that dulls polished gold or silver over time. The comfort-fit interior keeps the slim profile comfortable for extended daily wear.
Specs:
- Width: 4mm
- Material: Tungsten carbide
- Profile: Beveled edges
- Finish: Polished
- Fit: Comfort-fit interior
- Style: Unisex
- Warranty: Lifetime Limited
- Resizing: Not resizable — free first size exchange included
FAQ:
Is 4mm a good width for a wedding band?
Yes — 4mm is a popular choice for a slim, understated wedding band, especially for those who prefer a more minimal look.
Will the polished finish scratch or dull over time?
No — tungsten carbide is highly resistant to scratching, so the polished finish holds its shine far longer than softer metals like gold or silver.
Is a 4mm band comfortable for daily wear?
Yes — the comfort-fit interior curves gently inward, making the slim profile easy to wear for extended periods.
Can this ring be resized if it doesn't fit?
Tungsten carbide can't be resized after manufacturing, but the first size exchange is free — check our Size Guide before ordering to get an accurate fit.
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Full Transparency
What's Actually Inside Your Ring
No vague "premium materials" claims. Here's exactly what makes up every TungstenNation ring, layer by layer.
Tungsten Carbide Core
The structural body of the ring. This is where the hardness comes from — rated 8.5–9 on the Mohs scale, which is why it resists scratches that dull softer metals over time.
The Binder
Pure tungsten is too brittle for jewelry, so it's fused with a binder metal to hold the structure together. We disclose which binder is used in every listing — nickel or cobalt — instead of leaving it out.
Surface Finish
Color and texture (brushed, polished, matte) are set into the surface during manufacturing, not sprayed or plated on top — so it doesn't chip or fade with daily wear.