Dice are measured in millimeters (mm) from side to side, and while dice can range in size from 5mm all the way up to 100mm or more, there are a few dice sizes that are considered "standard": 5mm, 12mm, 16mm, 19mm, 25mm, and 50mm.
One inch is equvalent to 25.4 millimeters, so a 16mm dice is roughly 2/3 of an inch in size, and a 19mm dice is about 3/4 of an inch.
With all the sizes of dice available, it's sometimes hard to know which size you need. Is a 12mm dice big enough to easily game with? Just how large is a 25mm dice compared to other game components? Take a look below at our examples of all the common dice dimensions to find out.
5mm Dice (3/16")
These extremely small dice can be used for gaming if you've got limited space for rolling (and good eyesight), but they're even better to use as game markers or to track points or scores on game units or cards. They're also great for creative applications such as crafts, decorations, jewelry, or artwork.
8mm Dice (1/3")
At just a third of an inch in size, these dice are very small but still usable for gaming. And the best thing about using 8mm or 12mm dice is that lightweight game pieces won't get knocked askew by any errant tumbling dice.
12mm Dice (1/2")
These half-inch dice are frequently found in board games (although they are not as common as the 16mm dice). They're good to use when you need to roll many dice at once, since 8-10 will fit comfortably in the palm of your hand.
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16mm Dice (2/3")
The most common size of dice. More colors and styles of dice can be found in this size than in any other. Comfortable in the hand, easy to roll, and very readable, these dice are sized and designed for maximum usability.
19mm Dice (3/4")
Chunkier and a bit heavier than their 16mm siblings, 19mm dice make excellent, easy-to-read game dice, particularly for tabletop games requiring 1 to 3 dice. This is also the size of gaming dice used in casinos.
25mm Dice (1")
Solid, hefty dice, perfect for party or casino games, classroom use, or decorative purposes. If you need dice that are readable from a few feet away, these do the trick.
50mm Dice (2")
Because of the large size of these dice, they're typically produced in lightweight foam. Sturdy enough to use in a classroom, they're also great for party games. Or you can stack them or adhere them together to create some cool game room decor!