Gold bars run from 1 gram to 1 kilo, and silver bars from 1 gram to 100 ounces. The standard minted gold sizes are 1 g, 2.5 g, 5 g, 10 g, 20 g, 1 oz, 50 g, 100 g, 250 g, 500 g, and 1 kilo; the standard silver sizes are 1 g, 5 g, 10 g, 1 oz, 2 oz, 5 oz, 10 oz, 100 g, 250 g, 500 g, 1 kilo, and 100 oz.
Both charts below price every standard size at tonight’s spot — gold $4,062.20 and silver $52.02 per troy ounce, checked November 5, 2026 — so the size you are considering has a melt number next to it. Dimensions are typical for minted bars and vary by mint. Data by Bullion Price Check, checked November 5, 2026.
Gold Bar Sizes Chart
| Size | Weight in grams | Melt value tonight | Typical footprint |
|---|---|---|---|
| 1 gram | 1 g | $130.60 | About 15 × 9 mm — fingernail size, usually sealed in an assay card |
| 2.5 gram | 2.5 g | $326.51 | About 19 × 11 mm |
| 5 gram | 5 g | $653.01 | About 23 × 14 mm |
| 10 gram | 10 g | $1,306.02 | About 27 × 16 mm |
| 20 gram | 20 g | $2,612.05 | About 34 × 20 mm |
| 1 troy ounce | 31.1 g | $4,062.20 | About 41 × 24 mm — the most liquid size in the world |
| 50 gram | 50 g | $6,530.11 | About 42 × 25 mm, thicker than the 1 oz |
| 100 gram | 100 g | $13,060.22 | About 47 × 27 mm minted; cast versions are chunkier |
| 250 gram | 250 g | $32,650.55 | Cast bar, roughly 65 × 35 mm |
| 500 gram | 500 g | $65,301.10 | Cast bar, roughly 80 × 45 mm |
| 1 kilo | 1,000 g | $130,602.20 | Cast bar, roughly 117 × 53 mm — two hands, serious heft |
Silver Bar Sizes Chart
| Size | Weight | Melt value tonight | Notes |
|---|---|---|---|
| 1 gram | 1 g | $1.67 | Novelty and gift size; premium per gram is the highest in silver |
| 5 gram | 5 g | $8.36 | Small minted bar, usually in an assay card |
| 10 gram | 10 g | $16.72 | About a third of a troy ounce |
| 1/2 oz | 15.55 g | $26.01 | Less common than the gram sizes around it |
| 1 oz | 31.1 g | $52.02 | The standard — about 50 × 29 mm minted; our 1 oz flag-design bar is $54.79 tonight |
| 2 oz | 62.2 g | $104.04 | Mostly poured and specialty pieces |
| 5 oz | 155.5 g | $260.10 | Minted and poured; premium per ounce starts falling here |
| 10 oz | 311 g | $520.20 | The stacker’s bar — about 90 × 52 mm in minted form |
| 100 gram | 100 g | $167.25 | The European-standard mid size |
| 250 gram | 250 g | $418.12 | About 8 troy ounces |
| 500 gram | 500 g | $836.23 | About 16 troy ounces |
| 1 kilo | 1,000 g (32.15 oz) | $1,672.48 | Our Valcambi kilo bar is $1,810.66 tonight — see our kilo silver bar price tracker |
| 100 oz | 3,110 g | $5,202.00 | The institutional bar — lowest premium per ounce, heaviest lift |
How Size Changes the Price You Actually Pay
Melt is the floor, not the price. The smaller the bar, the more of its price is striking, assay, packaging, and handling — which is why a 1 gram gold bar can cost 20–30% over its $130.60 melt while a kilo trades within about 1% of its $130,602 melt. The same curve runs through silver: the per-ounce premium on a 1 oz bar is several times the per-ounce premium on a 100 oz bar. Our gold price per gram index tracks that curve live for gold, and the 1 gram gold bar size guide shows the smallest size up close. The practical rule: buy the largest size your budget and your exit plan allow, and buy small sizes on purpose — as gifts, for divisibility, or because the design is the point — never by accident.
Two format notes the charts cannot show: minted bars under about 100 grams usually arrive sealed in assay cards (keep them sealed — the card is part of the resale value), and cast or poured bars trade on weight and maker reputation rather than finish, which is why their dimensions wander furthest from the table.
The Middle of the Range, on Our Shelves Tonight
The 1/2 oz gold bar at $2,113.34 sits between the 10 g and 1 oz rows — about half the melt step to a full ounce with roughly half the premium drag of the gram sizes. It is the size buyers pick when the 1 oz is a stretch and the gram bars feel too small to matter.
Bar Sizes FAQ
What is the most common gold bar size?
The 1 troy ounce bar (31.1 g) is the global standard — the deepest market, the tightest spreads, and the easiest resale. Gram sizes dominate gifting; kilos dominate serious storage.
What sizes do silver bars come in?
From 1 gram to 100 ounces. The sizes that matter for most buyers are 1 oz, 5 oz, 10 oz, 1 kilo (32.15 oz), and 100 oz, priced in the chart above.
Is a bigger bar always cheaper per ounce?
Per ounce, yes — fabrication cost spreads over more metal as size rises. But the biggest bars are the hardest to sell in pieces, so the cheapest per-ounce format is not always the right one for an exit in smaller steps.
How big is a 1 oz gold bar?
About 41 × 24 mm and roughly 3 mm thick in minted form — smaller than a credit card’s short edge, and heavier than it looks at 31.1 grams.
Why are gram bars so expensive per gram?
Because the striking, assay card, and handling cost nearly as much as for a bigger bar, divided by one gram of gold instead of thirty-one. The per-gram index linked above shows the whole curve.
Melt values use spot prices checked on November 5, 2026 and move with the markets; dimensions are typical for minted bars and vary by mint. Shelf prices shown were live when checked and change with spot. This guide is educational, not financial advice.