THE SHORT ANSWER
Four sizes share one alloy but create different purchase economics
American Gold Eagles are available with 1, 0.5, 0.25 or 0.1 fine troy ounce of gold. Because each coin is 22 karat, gross mass is greater than fine-gold weight. The one-ounce coin is normally the cleanest percentage-cost benchmark; fractional coins exchange some cost efficiency for smaller purchase and resale units.
OFFICIAL SIZE TABLE
Keep five specification fields separate
Every row uses 91.67% gold, 3% silver and balance copper. Do not multiply the label by 91.67%: the label already states fine gold. The added alloy explains why gross weight exceeds fine-gold weight.
WHOLESALE REFERENCE
Smaller coins have higher current Mint percentage terms
Current Mint percentage above the LBMA PM gold reference for Authorized Purchasers.
Current Mint percentage above the LBMA PM gold reference for Authorized Purchasers.
Current Mint percentage above the LBMA PM gold reference for Authorized Purchasers.
Current Mint percentage above the LBMA PM gold reference for Authorized Purchasers.
These percentages describe one wholesale layer and can change. They exclude the retail dealer's inventory and margin, payment-method adjustments, shipping, insurance, tax, storage and the exit bid. A consumer cannot use the 3% one-ounce term as a guaranteed checkout premium.
NORMALIZE BEFORE COMPARING
Compare total cost per fine ounce, not price per coin
Use the same payment method, shipping destination, quantity, tax treatment and time for every offer.
A tenth-ounce coin should cost much less per coin than a one-ounce coin, yet still cost more per fine ounce. Likewise, a ten-coin fractional order can incur different shipping or price-break terms from one full-ounce coin. The useful comparison is the complete basket, not an isolated unit sticker.
DECISION FRAMEWORK
Size changes three practical constraints
Fractions require less capital per coin and may support staged purchases.
Do not ignore percentage premium.Several smaller coins can be sold separately instead of liquidating one full ounce.
Verify local bid depth.Fabrication and handling tend to occupy a larger percentage of a small coin.
Use same-time asks and bids.Smaller dimensions can make measurement and visual inspection harder.
Never turn tolerance into authentication.The recommendation reverses when the one-ounce coin creates an unacceptable liquidity or budget concentration. Conversely, fractional flexibility is not valuable if its extra round-trip cost exceeds the benefit in the buyer's likely holding and exit plan.
MEASUREMENT LIMIT
Published numbers are reference records, not a pass/fail machine
A scale and caliper can reveal a material mismatch, but results depend on calibration, resolution, handling, wear and the tested holder. A matching weight and diameter do not establish metal composition or eliminate a sophisticated counterfeit. Use the coin measurement checker to record deltas, then follow the layered gold-coin testing guide when risk or value justifies escalation.
PRIMARY GOVERNMENT SOURCES
Every product claim traces to a U.S. Mint record
- The U.S. Mint bullion program page supplies the four sizes, composition, gross weights, diameters, denominations and government-guarantee boundary.
- The Mint's Authorized Purchaser terms supply the currently published wholesale percentage and minimum order. Those terms are not retail prices.
Sources reviewed July 31, 2026. U.S. Mint catalog prices, availability, household limits, product limits and wholesale terms can change. Verify the exact year, finish, denomination, product code and seller before a transaction.
FREQUENTLY ASKED QUESTIONS
American Gold Eagle size questions
What sizes do American Gold Eagles come in?
The standard bullion family has one-ounce, half-ounce, quarter-ounce and tenth-ounce fine-gold sizes.
Does a one-ounce Gold Eagle weigh one ounce?
It contains one fine troy ounce of gold but has a published gross weight of 1.0909 troy ounces, or 33.931 grams, because its 22-karat alloy also contains silver and copper.
Which Gold Eagle size usually has the lowest premium?
The Mint's current wholesale percentage is lowest on the one-ounce size, but a retail decision requires same-time delivered asks and executable bids. Inventory and dealer pricing can reverse the result.
Does the face value determine Gold Eagle value?
No. The denomination establishes legal-tender identity. Bullion value begins with fine-gold content and the current gold reference, then adds or subtracts real product-market terms.
Can dimensions authenticate a Gold Eagle?
No. Weight and diameter are consistency checks, not an authenticity certificate. Provenance, visual evidence, measurement uncertainty and additional professional methods may be needed.