How stamp grading works: the 70–100 scale explained

When collectors talk about a stamp's "grade," they mean a quality score assigned by a third-party grading service after examining the stamp under magnification and good light. In the United States the best-known service is Professional Stamp Experts (PSE), and the scale most U.S. collectors use runs from 0 to 100. In practice, the grades you'll see on desirable stamps cluster in the upper part of that range, from 70 up to 100.

What the numbers mean

Each number maps to a long-established quality tier. The common grades and their names are:

• 70 — Fine. A sound, presentable stamp, but noticeably off-center or otherwise modest in appearance.
• 75 — Fine to Very Fine. Between Fine and VF.
• 80 — Very Fine (VF). The benchmark "nice" grade; balanced but not exceptional.
• 85 — Very Fine to Extremely Fine.
• 90 — Extremely Fine (XF). Clearly above average, with strong centering and margins.
• 95 — Extremely Fine to Superb. Excellent in nearly every respect.
• 98 — Superb. Very few flaws; the kind of stamp that stands out across a dealer's stock.
• 100 — Gem. As close to perfect as the issue is found.

Grades below 70 exist, but most collectors lump them together as "low grade" because the price differences down there are small. The action — and the money — happens from 90 upward.

What graders actually look at

A grade combines two things: how the stamp looks, and whether it is sound.

Appearance

• Centering is the single biggest visible driver of most grades. It's how evenly the design sits inside the four margins. (We cover this in depth in stamp centering explained.)
• Margins — their size and balance around the design.
• Color, freshness, and impression — how bright and crisp the stamp is.
• Cancellation, for used stamps — a light, neat cancel is preferred to a heavy smudge.

Soundness

A beautiful stamp with a hidden problem will not earn a high grade. Graders check for faults such as thins, tears, creases, pulled or short perforations, stains, and gum problems (hinging, disturbance, or regumming on mint stamps). A single confirmed fault can cap a stamp far below what its centering alone would suggest.

The "J" — Jumbo stamps

Occasionally a stamp has margins so unusually large and balanced that it earns a Jumbo designation, written as a "J" after the grade (for example, 95J). Jumbos are prized because oversized margins are rare and visually striking.

Why one point matters

Grading exists because tiny differences in quality translate into large differences in price. For a scarce stamp, the jump from a 95 to a 98, or from a 98 to a 100, can multiply the value several times over, because so few examples survive in that condition. That's also why grading is worth paying for only on the right stamps — a topic we cover in is your stamp worth grading?

What a photo can't show

Some of the most important factors in a real grade — thins, regumming, and gum disturbance — often don't show up in any image. That's a hard ceiling for any photo-based assessment, including ours: it's why an image-based pre-grade should be read as an informed estimate of visible condition, not a guarantee. The certified grade from a professional service is always the real answer.