There is no industry-wide standard for mapping numbers 1...20 across the faces of a regular icosahedral d20 die. Manufacturers have used several configurations. Their choices appear in dice collections here and here .

Spindowns typically aren't balanced properly, and if they're weighted more to one side or another the numbering layout is much more likely to make your rolls skew noticeably higher or lower than the expected average. I'd swap it out for a proper d20 …

School 2 says that if your die is somehow miraculously balanced so that it is equally likely that any side will land on the bottom (therefore: the opposite side will land on top), it still doesn't matter how you layout your die. Just put all 20 numbers on there and enjoy!

Our d20 measures 22 mm face-to-face, making it slightly larger and heavier than most d20s, which are typically 19-20 mm. Our d30 measures 27 mm face-to-face. Magic-numbered, numerically-balanced d20 dice page for The Dice Lab, a manufacturer of unique polyhedral dice.

Jan 7, 2021 · I recently printed a set of dice, but the d20 is numbered weirdly. opposite sideas still add up to 21, but for example the 20 has 8 below it like normal, but 14 to the top left and 11 to the top right. The 1 has 13 to the bottom, 10 to the top left, and 7 to the top right. (orientation is based on the orientation of the 20/1).

Apr 3, 2018 · If anyone is interested in "authenticity", I pulled up some papercraft die models that you can use for recreating the numbered faces in the "correct" orientation. This is the standard layout for a d20 and This is the layout of a "spindown" d20.

Jul 5, 2000 · d20: There are twenty sides on a d20, or an aptly named twenty-sided die. The d20's number pair s (the numbers that are polar opposite s on a normally distributed die) always total to 21. Why? Well, the idea was to take the most distant numbers possible on a 20-sided die, 20 and 1, and place them opposite.

Jun 12, 2016 · A regular D20 die (icosahedron) as depicted above has the number 1 to 20 arranged on its faces such that the sum of opposing faces is 21. Each triangular face touches three other faces directly by a shared edge, f.e. (1)-{7,13,19}.

The d20 System is a role-playing game system published in 2000 by Wizards of the Coast, originally developed for the 3rd edition of Dungeons & Dragons. [1] The system is named after the 20-sided dice which are central to the core mechanics of many actions in the game.