A coin capsule or "slab" is a type of plastic capsule designed to prevent coins from becoming damaged by protecting it from outside

contaminants Contamination is the presence of a constituent, impurity, or some other undesirable element that spoils, corrupts, infects, makes unfit, or makes inferior a material, physical body, natural environment, workplace, etc. Types of contamination Wi ...

, scratches and drops while allowing the coin to be viewed through

transparent Transparency, transparence or transparent most often refer to: * Transparency (optics), the physical property of allowing the transmission of light through a material They may also refer to: Literal uses * Transparency (photography), a still, ...

plastic. Coin capsules are commonly used by

coin collectors Coin collecting is the collecting of coins or other forms of minted legal tender. Coins of interest to collectors often include those that were in circulation for only a brief time, coins with mint errors, and especially beautiful or historic ...

numismatists A numismatist is a specialist in numismatics ("of coins"; from Late Latin ''numismatis'', genitive of ''numisma''). Numismatists include collectors, specialist dealers, and scholars who use coins and other currency in object-based research. Altho ...

or coin grading services to store and keep coins safe. The varied nature of coin sizes has led to a wide range of differently sized capsules becoming available each offer different levels or protection or security. Some types of capsules are designed with the ability to be reopened while others, once closed cannot be reopened without damaging the capsule. Now coin capsules are coming with adjustable foams inside it so that coin doesn't move after insertion in capsules. Starting from 20mm, it can vary in size like 31mm, 35mm, 44mm and 50mm.

References

{{reflist, 30em Coin grading Numismatics Coin collecting