I am not a D&D player, but when I saw the contest at printables my fingers were itching to contribute an entry. So here it is an hand holding a D21 dice. You may store some more dices in the box/pocket on the bottom of the hand. Be warned: I'm not sure if all the dice needed for a D&D would fit in as i only own one D21. Feel free to adjust the pocket-size with in the blender file and add a comment if your dices match.
The hand is designed to hold an D21 dice, that has a size of 24mm from tip to tip, respectively 20mm diameter from face to face. But anything with an size of round about 21-23mm should also fit. I added a size tester, so you can check if it fits without having to print the hole hand.
The hand is based on the work (cc0) of erik90mx on blendswap (https://www.blendswap.com/blend/2429).
The author marked this model as their own original creation.