Good job Doc, very scientific. You made me curious with your study so I went searching for the official specifications for casino dice in craps. I found:

U. S. Casino Dice Gaming Commission

Minimum Technical Specifications

Edition 1. 01. 2013

Apparently there are no requirements specifying the weight of the dice except that the weight must be uniform and equally distributed throughout each individual die.

The only specification pertaining to the weight of the dice appears in the following rule:

6.8

The weight of the dice should be evenly distributed throughout the dice with no side
lighter or heavier than any other side.

—————————————————————————————————————–

There are specifications for the size of the dice which appear in the following rule:

6.16.1

The dice must be formed in the shape of a cube and of a size no smaller
than (19.05mm / 0.750 of an inch on each side nor any larger than
(19.685mm / 0.775 of an inch) on each side.

—————————————————————————————————————–

FYI, .750 of an inch = 3/4" and .775 of an inch = 31/40".

Here is the website: http://uscdgc.org/Dice_Specifications.php

Skinny, my question to you is can one possibly feel that difference between a .775 and .750 of an inch? I am asking because at the casion I go to in CT I played at two different tables. Played at the longer table first and then went to a 12footer. When I picked up the dice at the second table I noticed immediately the dice felt bigger in my hand. I could tell by how they sat on my index finger and how they felt coming off my finger tips. It was not the first time I noticed this. Imagination or not? Professor

Some of the casinos we play in use 0.775" dice and I have both canceled dice from the casinos and have purchased 0.775" dice for practice. Yes, you can tell the difference between the two sizes. Bally’s LV also uses/used the larger dice. We had a hard time finding/buying the 0.775" dice for practice. Midwest Game Supply Company is the only place we could find the larger dice but, they didn’t seem to want to sell small quantities.

Tom
Cleveland Crew

I agree with ThomasH. I can definitely feel the difference in the larger dice. They feel bigger and sit a lot easier in my grip because of the size. The .775" dice seem to be heavier to me as well. I notice that they die a lot sooner than the .750" dice. At least that was my experience at the one casino that used the larger dice.

With the larger dice I had to throw them a lot closer to the back wall to get them to hit the back wall. If I was a bit shorter they would stop soon after landing and not make it to the back wall. I got very little roll with the larger dice. Of course some of that was due to the surface conditions of the table but it was also due to the fact that those dice were heavier and did not bounce as much as the smaller, lighter dice.

I must agree that different size dice do make a difference—but same size dice of different colors, there appears to be little or no difference to me.

Anybody else have any input. This is a most interesting thread.

Doc

Also agree about being able to feel the difference in the dice. I am sure the general public would not know the difference but when we all handle dice everyday the slightest differences are easily felt.

Now you have me curious about the difference in the weight between the small and large dice as I also like the way the large ones sit down at the rail when I use them. Makes sense that they would be heavier as more material would be used to make the larger dice. But how much more weight? What kind of difference are we talking about? Doc are you up for another round of weighing dice? 😀

The larger dice are 10.3% larger in volume than the smaller dice. Following that logic, they should weigh approximately 10.3% more as well.

According to Doc’s scale, the smaller dice are around 44.7 carats or 8.9 grams.

The larger dice should then weigh about 49.3 carats or 9.9 grams.

In Doc’s experiment with the same size dice the largest difference was about 1/2 carat between the lighter white dice from the heavier red and green dice. I agree that is not enough for someone to be able to tell the difference. But a 5 carat or 1 gram difference is definitely large enough for a practiced GTC player to be able to notice. It should also be enough to have an effect on the reaction of the dice on the table.

Thanks Skinny!

Love your logical mind—-and what a "Beautiful" mind it is! 😀 😎

Great information Skinny.

doc

This comment comes from experience

On the East Coast, go to the "Big House" on the Boardwalk

Just "watch" the nice heavy blue dice — keep your 401-G intact

This is a most interesting thread. An engineer could probably help. Sharpshooter, where art thou? Larger dice means more mass hence since you cannot see weight but
do see the landing zone do you throw with greater force to get to the same landing spot? The obvious answer is yes. So then how does that extra force change your results?
There are so many fascinating variables. Do heavier dice tend to roll less? How much? Since throwing force is already a variable and not a constant how are things like arch and
table conditions affected? If two dice weigh a little different does that account for one landing short and the other rolling extra or going further and creating more double pitches?

Ladies and gentlemen. You cannot account for all the variables. The best you can do is to be adaptable to each situation, table , dice. 1. You will develop an edge, bet in to it.
2. Adapt, and conquer.

Still the physics are drawing us all in, aren’t they?

OMC

Heavy Dice require more energy to get to the wall

If you try to throw heavy dice with touch/less energy and land them about 3-6 inches from the wall, those dice WILL NOT hit the back wall ….. then guess what, here comes the heat from the suits

If you throw with more force/energy, in order to hit the back wall, those heavy dice will come off the wall like "Mexican Jumping Beans" and hence, become almost a random shot.

I’ve seen it for the past two years at the "Big House"

I think some will toss better with the small dice for whatever reasons—toss energy, hand size, etc. some will do better with the large dice. I don’t think it is a one size fits all. Obviously, we have to adapt as OMC suggested or not play at the places where our shots seem random consistently for whatever reasons. The key is being able to recognize what we can and want to deal with and what we can’t or don’t. I don’t think anyone should go out looking for large dice just because we are discussing them here. Just information to be aware of and a fun discussion.

Just my thoughts.

For the past two years at the Big House, I’ve seen play sessions whereby there are more Aces and Twelves than 6/8’s combined when the heavy dice are being used

Some days the 7-out combo of the day is 6/1

Other days the 7-out combo is 5/2

You’ll hardly ever see a day where the majority 7-out combo is 4/3

Bumb.

Here’s an observation that I’ve seen and I hope I’m not repeating a prior posting.
I am intrigued by the difference between frosted and polished dice.
I’ve even found both kinds of dice in use on different tables in the same casino.
Has anyone else noticed if there a perceivable difference?
What do you think the difference is?