NGC uses the Sheldon scale of 1 to 70 to grade coins based on their condition and strike type. See the standards for each numeric grade, the Plus and Star designations, and the strike characters for different features.

Learn how PCGS assigns grades from "1" to "70" to coins based on the Sheldon Scale and other criteria. See the visual guide and the classic table view of the PCGS grading standards for Mint State, Proof, Specimen, and Plus grades.

PCGS is the industry leader in coin grading and authentication since 1986. Learn about the various coin services, submission types, pricing, turnaround times, grading standards and guarantee offered by PCGS.

NGC provides accurate, consistent and impartial assessment of coins, tokens and medals, backed by the NGC Guarantee. Enter NGC Price Guides and Census to research values and rarity of certified coins.

Learn what coin grading is, how it is determined by various criteria and how it affects the value of coins. Compare different grading systems used in the US, Europe and other countries.

Learn how NGC receives, grades, encapsulates and ships millions of coins each year with security, consistency and guarantee. Watch a video or read the steps of the NGC coin grading process.

Learn how coin ratings are determined by independent grading services and why they are important for collectors. Find out the Sheldon Grading Scale and the specialty proof coins.

Learn how to grade coins and why coins are graded in the first place. Find out the factors that affect coin condition, the coin grading scale, and the benefits of professional grading services.