Gold Bars by Size: 1 oz vs 10 oz vs Kilo
Straight answer
Smaller gold bars (1 g, 5 g, 10 g, 1 oz) carry higher premiums per ounce but are easy to sell in pieces and reach a wider pool of buyers. Larger bars (10 oz, 1 kilo ≈ 32.15 oz, 100 oz) carry lower premiums per ounce, so you pay less above spot — but you must sell the whole bar at once, and fewer dealers and private buyers can absorb a single large piece. For most people, the 1 oz bar is the practical sweet spot: a reasonable premium with broad liquidity. Step up to 10 oz or a kilo only when you’re buying a large sum, plan to hold it intact, and have a dealer who will buy it back. Whatever the size, stick to bars from LBMA Good Delivery–accredited refiners (PAMP Suisse, Valcambi, Argor-Heraeus, Royal Canadian Mint, Perth Mint) and keep the assay card sealed for resale.
Gold bar size is a trade-off between cost and flexibility, and the two pull in opposite directions. The bigger the bar, the cheaper the gold per ounce — but the harder it is to sell when you only need part of your money back. This guide explains how premium, liquidity, and divisibility change as you move from gram bars up to 100-ounce bars, the difference between minted and cast bars, why the brand and the sealed assay card matter, and how to decide which size actually fits your situation. The figures here are directional; premiums move with spot, demand, and how much you buy at once.
The core trade-off: premium versus liquidity
Every bar carries a premium over spot — the markup above the metal value that covers refining, fabrication, distribution, and dealer margin. The work of refining and stamping a bar is roughly fixed regardless of its weight, so that cost is spread over more ounces in a larger bar. A kilo bar therefore costs much less above spot, per ounce, than a 1-gram bar.
That makes large bars look like the obvious bargain — until you sell. A small bar can be sold one piece at a time, to almost any dealer, and even privately. A large bar has to be sold whole, to a buyer who can write a five-figure check on the spot, and many local shops won’t keep that much cash on hand. You trade a lower buy-in cost for less flexibility on the way out. The right size is the one where you accept the premium you’ll pay and the liquidity you’ll have when it’s time to sell.
Small bars: 1 g, 5 g, 10 g, 1 oz
Small bars are the most flexible gold you can own. A 1-gram bar holds a tiny fraction of an ounce; a 1-ounce bar is the standard retail unit and the most widely traded bar size in the US. Their advantage is divisibility — if you need to raise a modest amount of cash, you sell one or two pieces and leave the rest intact. They also sell quickly, because the dollar amount is within reach of any dealer and most private buyers.
The cost is premium. Gram and few-gram bars can carry markups several times that of larger bars on a per-ounce basis, because the fixed fabrication cost is spread across so little metal. The 1-ounce bar strikes the best balance for most buyers: its premium is modest, and it’s liquid enough to sell anywhere gold trades. If you want the smallest practical premium while keeping easy resale, the 1 oz bar is usually the answer.
Large bars: 10 oz, 1 kilo, 100 oz
Large bars are where the per-ounce premium drops to its lowest. A 10-ounce bar, a 1-kilo bar (32.15 troy ounces), or a 100-ounce bar gives you the most metal per dollar above spot. For someone deploying a large sum who intends to hold the gold untouched for years, that saving is real.
The catch is liquidity and divisibility. You can’t sell half a kilo bar — it’s all or nothing. Selling one means finding a buyer who can pay tens of thousands of dollars at once, which narrows the field to larger dealers and online buyers, often with a shipping-and-verification step. If you might need to sell in smaller increments, a large bar forces you to liquidate the whole thing or not at all. Large bars suit concentrated, long-horizon holdings; they’re a poor fit if flexibility matters to you.
Minted versus cast bars
Bars come in two manufacturing styles, and the difference shows up in both price and presentation.
- Minted (struck) bars are cut from rolled gold sheet and stamped with precise edges, a polished face, and crisp markings. They almost always come sealed in tamper-evident packaging with an assay card certifying weight and purity. They look cleaner, are easier to authenticate at resale, and carry a slightly higher premium for that fabrication and packaging.
- Cast (poured) bars are made by pouring molten gold into a mold. They have a rougher, more organic look and skip the elaborate packaging. They carry a lower premium because they’re cheaper to produce. They contain exactly the same gold and are perfectly legitimate from an accredited refiner.
For small bars, minted is the norm and the sealed assay card is worth keeping. For large bars, cast is common and entirely fine. Neither is “better” — minted buys you presentation and easier verification, cast buys you a lower markup.
Comparing gold bar sizes
| Bar size | Typical premium per oz | Liquidity / divisibility | Best for |
|---|---|---|---|
| 1 g – 10 g | Highest | Very easy to sell; highly divisible | Gifts, smallest budgets, maximum flexibility |
| 1 oz | Moderate | Easy to sell; sells one piece at a time | Most buyers — the practical sweet spot |
| 10 oz | Lower | Sells whole; fewer ready buyers | Larger budgets willing to sell in 10 oz units |
| 1 kilo (≈32.15 oz) | Low | Sells whole only; needs a larger dealer | Concentrated, long-hold positions |
| 100 oz | Lowest | Least divisible; smallest buyer pool | Large sums held intact for years |
Premium tiers are directional, not live quotes. The bands overlap, and actual markups shift with spot, the refiner, and how much you buy. Use the table to narrow your choice, then check a real quote against the metal value with the premium calculator.
Stick to accredited refiners and keep the assay card
Size matters less than provenance. Whatever weight you choose, buy bars from refiners on the LBMA Good Delivery list or other recognized accreditations — names like PAMP Suisse, Valcambi, Argor-Heraeus, the Royal Canadian Mint, and the Perth Mint. A bar from a recognized refiner resells far more easily than an unbranded or obscure one, because the buyer trusts the stamp without extensive testing. See the full list of trusted gold bar brands.
For minted bars, keep the assay card and tamper-evident packaging sealed. The sealed card is part of the bar’s resale value — it lets the next buyer confirm weight and purity at a glance. Once you break the seal, some dealers will re-verify the bar before buying it, which can slow the sale or shave the offer. Buy it sealed, store it sealed, sell it sealed.
Counterfeit risk and buying from trusted dealers
Popular bars are also the most counterfeited — fakes tend to copy the best-known refiners and the most common sizes precisely because those move easily. The defense is simple: buy from established dealers rather than auction sites, classified listings, or unknown private sellers offering a price that looks too good. A reputable dealer sources directly from refiners or the wholesale market and stands behind authenticity.
If you already hold a bar or are buying secondhand, learn the basic checks — weight, dimensions, magnet behavior, and the markings — before you rely on it. The full process is covered in the authentication guide. The sealed assay card and a recognized refiner’s stamp do most of the work, which is another reason both matter.
Bars versus coins
Choosing a bar size is one decision; choosing bars over coins is another. Bars are cheaper per ounce — especially in larger sizes — and that’s their main appeal. Coins are more liquid and more universally recognized: any dealer and most private buyers know a one-ounce sovereign coin on sight, and government backing adds trust. If you’re optimizing purely for the lowest cost per ounce on a large position, bars win. If you value the broadest possible resale market and instant recognizability, coins have the edge. Many buyers hold both. Weigh it fully in bars vs. coins.
- You might need to sell in smaller increments — you can’t sell part of a kilo or 100 oz bar.
- You’d be selling locally, where many shops won’t pay five figures for a single bar on the spot.
- The per-ounce premium saving is small relative to the liquidity you’d give up — run the numbers in the premium calculator.
- You’re tempted by a deep discount from an unknown seller — popular bars are the most counterfeited; buy from trusted brands and dealers.
- Liquidity and recognizability matter more to you than cost per ounce — compare bars vs. coins.
Which gold bar size should you buy?
Match the size to how you’ll sell, not just how you’ll buy. Buying a modest amount, or want the flexibility to sell a little at a time? Stay with 1 oz bars — moderate premium, easy resale. Buying a large sum you intend to hold intact for years, and you have a dealer who buys back large bars? A 10 oz or kilo bar saves you on premium. Gram bars are best left to gifts or the very smallest budgets, where their high per-ounce markup is the price of entry. Whatever the size, buy from an accredited refiner, keep minted bars sealed in their assay cards, and buy from a dealer you trust. The size is a smaller decision than buying clean, recognized metal at a fair premium and storing it well.
What size gold bar is best for most buyers?
The 1-ounce bar. It carries a moderate premium over spot — far lower per ounce than gram bars — while staying liquid enough to sell anywhere gold trades, one piece at a time. Larger bars (10 oz, kilo, 100 oz) cost less per ounce but must be sold whole to a narrower pool of buyers, so they suit large, long-hold positions rather than everyday flexibility.
Why do larger gold bars have lower premiums?
Because the cost of refining and stamping a bar is roughly fixed no matter its weight, and a larger bar spreads that fixed cost over more ounces. A kilo bar therefore costs much less above spot, per ounce, than a 1-gram bar. The trade-off is that large bars are less divisible and liquid — you can’t sell part of one, and fewer buyers can absorb a single big piece.
What’s the difference between minted and cast gold bars?
Minted (struck) bars are cut from rolled gold sheet, have precise edges and a polished face, and usually come sealed with an assay card — they carry a slightly higher premium for that fabrication and packaging. Cast (poured) bars are made by pouring molten gold into a mold, have a rougher look, and carry a lower premium. Both hold the same gold; minted buys presentation and easier verification, cast buys a lower markup.
Should I keep the assay card sealed?
Yes. For minted bars, the sealed tamper-evident card certifies weight and purity and is part of the bar’s resale value, letting the next buyer confirm it at a glance. If you break the seal, some dealers will re-verify the bar before buying, which can slow the sale or reduce the offer. Buy it sealed, store it sealed, and sell it sealed.