Hollow vs Solid Metal Dice for DnD: Weight, Sound, and Roll Feel Compared
TL;DR: Solid metal D20s typically weigh 28-35 g and produce a heavy, sometimes table-damaging clack on hardwood. Hollow metal D20s weigh 18-24 g, sound softer and more muted, and finish their roll faster on felt. The choice is not about which is "better" — it is about which trade-off matches your play setting. This guide covers the physical differences, the durability implications, and how metal sets fit alongside resin and gemstone dice in a long-term collection.
By Gideon Vance — longtime Dungeon Master and gemstone dice collector writing on dice materials, fairness, and play for EpicWinDND. Last reviewed June 2026.
What Makes a Die "Hollow"?
A hollow metal die has an internal cavity reducing its mass while keeping the outer geometry intact. Manufacturing approaches vary: some hollow dice are cast in two halves and joined, some are CNC-machined from a billet and have a center hole drilled and capped, and a few high-end variants use 3D-printed metal with a designed lattice interior.
Cavity Geometry Matters
If the internal cavity is perfectly centered, the hollow die behaves like a uniformly lower-density solid die — mass per unit face is balanced. If the cavity is off-center (a common defect on budget hollow dice), one or two faces will have more mass behind them, biasing the roll. Reputable hollow-metal sellers publish their cavity-tolerance specs, typically ±0.3 mm or tighter for premium sets.
What Solid Metal Means in Practice
Solid metal dice are usually CNC-machined from zinc alloy, brass, or stainless steel. Density ranges from about 7.1 g/cm³ (zinc alloy) to 7.9 g/cm³ (stainless), which is why a solid 18 mm metal D20 can crack into the 30 g range — roughly four times the mass of an equivalent resin D20.
Weight: What 28 g vs 18 g Feels Like
The most immediate difference is the weight in your hand. A 28 g solid D20 lands with intention; it does not "scatter" across a tray the way a lighter die does. A hollow D20 at 18-24 g still feels substantial but rolls more freely — closer to the behavior of a heavy gemstone D20 from the gemstone dice category than to resin.
Hand Fatigue Across a Session
Over a four-hour session with frequent rolls, solid metal can produce real wrist fatigue, especially when paired with a deep dice cup. Hollow metal stays comfortable across the same session because each roll requires less energy to launch. For players who roll often (rogues, anyone with multiattack), the weight difference matters more than expected.
Sound: The Audible Signature
Solid metal on hardwood produces a sharp, ringing clack. Hollow metal produces a duller thunk because the cavity dampens the high-frequency vibration. Some players prize the ring of solid metal as part of the ritual of rolling; others find it disruptive in shared spaces.
What a Felt Tray Changes
Both hollow and solid metal dice need a tray. The choice between felt, leather, and silicone affects the audio profile:
- Felt tray: absorbs most of the ring, leaves a soft "click" on each face transition. Recommended for both hollow and solid metal.
- Leather tray: harder surface, sharper sound, more visible roll — popular with solid metal sets.
- Silicone tray: dampens everything, makes both hollow and solid sound nearly identical. Recommended for late-night play or thin-walled apartments.
Durability and Table Damage
Across our hollow metal D20 designs — including the Golden Spire Hollow Polyhedral Set and the Glow-in-the-Dark Hollow Metal Set — the typical face-edge profile sits at roughly half the radial impact pressure of a comparable solid metal die at the same drop height. That is the engineering reason a felt-lined tray is sufficient protection for most hollow metal dice but recommended-only-with-caution for heavy solid sets.
Solid metal D20s have left visible dings on softwood tables in our customer feedback notes from review threads on tabletop gear forums. Hollow metal at the same drop height typically does not. If your table is unfinished pine or another softwood, hollow metal is a safer choice unless you commit to a leather or silicone tray.
Edge Wear Over Time
Both hollow and solid metal dice tend to develop micro-burrs on edges after hundreds of rolls, especially against gemstone or metal dice in the same pouch. Padded-slot storage prevents most of this. The classic mistake is storing a metal D20 loose with a resin set — the metal dings the resin, and over time the resin dust embeds in the metal engraving.
How Metal Compares to Resin and Gemstone
Each material category has a distinct profile. Use the table mentally:
- Resin: 9-14 g per D20, quietest, most consistent face flatness. Daily driver for stat-rolling and quick combat — see our 4d6 stat-rolling guide for why this matters.
- Hollow metal: 18-24 g, dampened sound, durable, the "premium feel without table damage" choice.
- Solid metal: 28-35 g, loud, intentional, the table-presence pick.
- Gemstone: 14-22 g, cool to the touch, unique mass per material, each die unique. Best for special characters or weekly campaigns. The sharp-edge dice mechanics apply most strongly to gemstone sets.
The "One Metal Set" Strategy
A common collection approach is to own one resin set (daily driver) plus one accent metal or gemstone set for boss fights and critical moments. Hollow metal hits the sweet spot for the accent role because it preserves the visual drama of metal without the table-damage and fatigue downsides of solid.
Cost and Material Economics
Metal dice sit at the higher end of the price ladder for a reason: machining or casting metal is fundamentally more expensive than pressing resin. A typical resin 7-piece set lands in the 15-35 USD range; hollow metal sets sit between 35 and 70 USD; solid metal sets push 50-120 USD depending on the alloy. Premium metal sets with enameled finishes and individual padded slots can reach 150+ USD.
Where the Cost Actually Goes
For hollow metal, the bulk of the cost is in the machining time per face and the finishing pass on the enameled numbers. For solid metal, the raw material weight contributes meaningfully — a 30 g solid stainless D20 has roughly four times the material cost of an 18 g hollow alternative of the same alloy. Players sometimes assume hollow dice are "cheaper because there is less metal," but the machining complexity often offsets the material savings. Sellers honest about manufacturing will explain this on the product page.
Buying Considerations
Three things to check before committing to a metal set:
- Material spec: zinc alloy is standard and corrosion-resistant; pure brass develops a patina over time; stainless is heaviest and most expensive. None is universally "best" — pick the one that matches your aesthetic.
- Finish process: enameled fills (color in the engraved numbers) hold up better than painted fills. Look for "enameled" or "glass-fill" in the product description for long-term color retention.
- Cavity centering (hollow only): ask for the cavity-tolerance spec. If the seller cannot quote one, expect a meaningful chance of asymmetric mass.
| Dimension | Solid Metal | Hollow Metal |
|---|---|---|
| D20 weight | ~28–35 g | ~18–24 g |
| Sound | Heavy clack (can mark hardwood) | Softer, more muted |
| Roll behavior | Lands with intention, less scatter | Rolls freely, finishes faster on felt |
| Long-session fatigue | Can cause wrist fatigue | Stays comfortable |
| Construction | CNC from zinc alloy / brass / stainless | Cast halves, drilled-and-capped, or 3D lattice |
| Fairness note | Uniform density | Off-center cavity can bias — check tolerance spec |
Frequently Asked Questions
Are hollow metal dice balanced?
If the manufacturing tolerance on cavity centering is tight (within ±0.3 mm), yes. The math is the same as for solid dice: the hollow simply lowers overall mass. Outside that tolerance, expect a measurable bias on rolls.
Will solid metal dice damage my table?
On hardwood: superficial scuffs likely after hundreds of rolls. On softwood (pine, untreated oak): dents possible from a single drop. On finished veneer: scratches likely. A felt or leather tray solves all cases.
How heavy is too heavy for stat rolling?
Solid metal D6s in the 9-12 g range each are common, which makes a 4d6 drop-lowest stat roll involve nearly 50 g of metal. That is tiring across 24+ rolls. Most experienced players prefer resin or hollow metal D6s for stat sessions specifically.
Do hollow metal dice rattle?
High-quality hollow metal dice do not rattle because the cavity is enclosed and contains nothing loose. If your hollow set rattles audibly, that usually means a manufacturing defect — either an unsealed cavity or a chip of metal that broke loose during machining. Ask for a replacement.
Do hollow dice feel cheap?
Quality hollow dice from reputable makers feel as substantial as solid alternatives. The "cheap" feeling usually comes from light-weight zinc-alloy hollow dice with thin walls, which flex slightly under finger pressure. Stainless or brass hollow dice with appropriate wall thickness feel indistinguishable from solid in terms of perceived quality.
Which is more durable long-term, hollow or solid?
Solid wins on raw impact survival because there is no cavity to deform. Hollow wins on edge-wear because the lower mass reduces impact pressure per roll. In practical terms, both will last decades with reasonable care; the deciding factor is usually scratches and finish wear, not structural failure.
Can I mix metal and gemstone dice in one set?
Aesthetically yes, but store them separately. Metal-on-gemstone contact in a single pouch will chip the softer stones (anything below 7 Mohs) within weeks of regular play.
Conclusion
Hollow and solid metal dice both belong in a serious dice collection, but for different roles. Hollow as the everyday premium pick; solid as the table-presence statement for special moments. If you want to expand beyond metal, the natural next step is the heavier end of the gemstone catalog — lapis lazuli and labradorite both roll with metallic weight while reading as something more rare. Browse the lineup at our gemstone dice pillar when you are ready to round out the collection.