So Fancy! These dice are hand made of teak and brass.
Approximately 3/4" with rounded corners.
What to do with them? Well, you do need five to play "Yacht Sea" (sorry about that Yahtzee / Hasbro...). This link has the rundown on the game: RULES.
And, if you want a scorecard, you can download it for free by clicking Yacht Sea Score Keeping.
If you want a handy, portable "box" to toss the dice in when you roll (so they don't go off the table or under the floorboards), consider the VALET TRAY.
What else can you play with dice?
Just two dice needed.
High roll goes first.
You win if the first roll is a Natural (7, or 11)
You lose if it is Craps (2, 3, or 12).
If neither a Natural or Craps are rolled, then the roll is considered the Point.
If a Point is rolled (4, 5, 6, 8, 9, 10) it must be repeated before a 7 is thrown in order to win. If 7 is rolled before the Point you lose. You keep rolling til you win—or lose.