Understanding the Sheldon Coin Grading Scale

Every hobby develops its own shorthand, and numismatics settled on a number. Say “MS-65” or “VF-20” to another collector and they immediately picture roughly the same coin, without needing to see it. That shorthand is the Sheldon scale, and understanding where it came from makes the abbreviations far easier to use with confidence.

Where the scale came from

The scale is named for Dr. William Sheldon, a researcher who in 1949 published a study of United States large cents. Sheldon needed a way to compare the condition of thousands of individual coins consistently, so he devised a numeric scale from 1 to 70, originally tied loosely to the idea that a coin in a given grade was worth some multiple of a base-grade coin. Over the following decades, the numismatic community adopted the 1-to-70 numbers for grading generally, detached from Sheldon’s original pricing logic, and it became the industry standard used by the American Numismatic Association and every major third-party grading service.

The letter prefixes

Each number pairs with a letter prefix describing the coin’s overall condition category:

• PO, FR, AG (1–3): Poor, Fair, and About Good — barely identifiable to heavily worn, with major details flattened.
• G, VG (4–10): Good and Very Good — the overall design reads clearly, but fine detail is worn away.
• F, VF (12–35): Fine and Very Fine — moderate wear, with most or all major and minor details still visible.
• XF/EF (40–45): Extremely Fine — light wear confined to the highest points of the design.
• AU (50–58): About Uncirculated — traces of wear on the high points, with most original mint luster intact.
• MS (60–70): Mint State — no wear at all, graded instead on marks, strike quality, and eye appeal.

Proof coins, struck specifically for collectors rather than circulation, use a “PR” or “PF” prefix instead of “MS” once they reach the 60-and-above range, reflecting their different manufacturing process rather than a different condition scale.

Why not every number is used below 60

Below Mint State, the scale doesn’t use every integer from 1 to 58. Instead it uses a defined set of recognized points: 1, 2, 3, 4, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50, 53, 55, and 58. Each of these represents a meaningfully distinct wear stage that graders have agreed is worth naming separately. From 60 to 70, by contrast, every whole number is used, because Mint State and Proof coins are distinguished by much finer differences in luster, the number and severity of contact marks, and how well the strike filled the design.

What a grade actually describes

A grade is a condition assessment, not a certificate of authenticity or a statement of rarity. Two coins of the identical date and mint can carry wildly different grades depending on how they were handled, stored, and circulated over their lifetime. A coin graded VF-20 has seen real circulation — moderate, even wear with the major design elements still legible. A coin graded MS-65, sometimes informally called a “gem,” never entered circulation at all and retains its full original luster, with only minor, scattered marks from normal handling at the mint and in transit.

It’s worth being precise about the vocabulary, because casual terms like “mint condition” get used loosely in everyday speech to mean anything from “pretty good” to “perfect.” In numismatics, “Mint State” has a specific, technical meaning: no wear whatsoever, full stop, regardless of how many marks or how weak the strike might be.

Grading is examination, not description

No description, chart, or reference — including this one — can actually grade a physical coin. Grading requires examining the coin itself, usually under magnification and in good lighting, to assess wear, strike, luster, and marks together. That’s exactly the job of a trained grader, and it’s why submitting a coin to a recognized third-party grading service, rather than relying on a photo or a written description, is the only way to get an authoritative grade.

Treat the Sheldon scale the way you’d treat any specialized vocabulary: learn what the words mean, use them precisely when describing what you see, and remember that the terminology describes condition and nothing else — not authenticity, rarity, or any other quality of the coin.