Stamp Grading Guide for Collectors

Condition is the single most important factor in a stamp’s value, often outweighing rarity. The same stamp — identical issue, identical date — can be worth ten times more in Extremely Fine condition than in Fine. A collector who understands grading buys intelligently, avoids overpaying, and builds a collection that holds its value. This guide walks through the full grading scale, what to examine, and how to distinguish grades in practice.

Why Condition Matters So Much

The price gap between grades is not subtle. A classic United States stamp catalogued at $500 in Very Fine condition might retail for $1,500 in Extremely Fine and as little as $100 in Fine-Very Fine. For rare early issues, the difference between Never Hinged and Hinged can be 300% or more. Dealers and auction houses apply these grades precisely because buyers have learned to demand them.

The Grading Scale

Most philatelic grading uses a points-based system (1–100) alongside descriptive grades. The grades below follow the standards used by major certification services such as the Philatelic Foundation and PSE.

Superb / Gem (98–100 points)

The finest stamps that exist. Perfectly centred — the design sits equidistant from all four margins. Original gum (OG) is pristine, bright, and undisturbed. Colours are vivid and fresh. Perforations are complete, even, and well clear of the design on all sides. These stamps are exceptionally rare and command significant premiums.

Extremely Fine (90–95 points)

Very well centred with only the most minor imperfections. Margins are noticeably larger than average on all sides. Gum is intact and fresh, perforations are complete. This is the benchmark for serious collectors and the grade at which most premium collections are assembled.

Very Fine (80–85 points)

Well centred, with margins that are clear on all sides, though not as generous as Extremely Fine. The design is not touched by perforations. A very presentable stamp with good eye appeal. This is the most common grade for premium-priced stamps in the market.

Fine (70–75 points)

Slightly off-centre, with one or two margins noticeably smaller than the others, but perforations clear of the design. Overall appearance is still good. Many affordable classic stamps trade in this grade.

Very Good (60–65 points)

Noticeably off-centre. One or two perforations may just touch the frame of the design, but the stamp is otherwise sound. Gum and paper are intact.

Good (50–55 points)

Heavily off-centre. Perforations cut into the design on one or more sides. The stamp is structurally sound — no tears or thins — but the visual impact is significantly reduced.

Fair / Poor (below 50 points)

Major faults are present: creases, thins, tears, heavy or smeared cancellations that obscure the design, missing perforations, stains, or repairs. These stamps have value only as space-fillers until a better example is found.

What to Examine

Centring. Hold the stamp at arm’s length. Margins should appear even. A quick visual check reveals most centring issues before you reach for the loupe.

Gum condition. On the reverse, gum is described as:

• NH (Never Hinged): full original gum, no hinge remnant or disturbance whatsoever.
• OG (Original Gum): gum is original but shows a hinge remnant (from a stamp hinge) or light disturbance.
• HR (Hinge Remnant): part of a hinge paper is still attached.
• NG (No Gum): gum is absent, either never applied or removed.

Perforations. Count them — missing or short perfs reduce value sharply. Examine with a loupe. “Pulled” perfs (where one is longer than adjacent ones) indicate a repaired stamp.

Thins. Hold the stamp up to a strong light source. A thin — where paper has been scraped away, often after hinge removal — appears as a brighter, more translucent area. Thins are a significant fault.

Creases. Visible on the face; confirmed by holding to oblique light.

Stains. Foxing (rust-coloured spots from fungal growth), toning, and soiling all reduce grade.

Mint vs. Used Grading

Mint stamps are graded primarily on centring and gum. Used stamps are graded on centring and the quality of the cancellation. A light circular date stamp (CDS) that does not obscure the design is far preferable to a heavy manuscript cancel or a machine slogan that bars across the stamp’s face. A well-cancelled used stamp in Very Fine condition can be more valuable than a poorly cancelled one in Extremely Fine.

How to Examine Stamps

Always use tongs — never bare fingers. Hold the stamp by its edges and examine the face under a 10x loupe in good lighting. Then check the reverse. Finally, hold the stamp up to a lightbox or a strong lamp to check for thins, repairs, and the presence of watermarks.

Professional grading services (PSE, PF, BPA in the UK) will certify high-value stamps for a fee and provide encapsulated holders. For stamps worth over £100/$150, professional certification is worth considering before buying or selling.

Next Steps

With grading understood, the next priority is storage — because condition is only preserved when stamps are housed correctly. Read How to Store Stamps to Prevent Damage for the full guide to albums, stockbooks, hinges, mounts, and the ideal storage environment.