Walmart used to sell professional-sized dominoes from Cardinal; but now the Cardinal sets I see in Walmart stores are standard sized. These are rather thin (though perfectly ideal if you prefer to hide your dominoes in your hand during a game -- you can hold more standard-sized bones!). If you would rather have the thicker professional (jumbo) size, then this Mexican Train/Chickenfoot set from Puremco is for you! The bones are just as good as those found in Cardinal's older jumbo sets. I was very pleased. ONE WORD OF WARNING -- the sounds from the battery-operated centerpiece can be horrendously LOUD AND ANNOYING (though not as bad if you're playing in a crowded place like a social hall). Thankfully you can leave these sounds turned off, if desired. The centerpiece does prove to be very handy when playing Mexican Trains. FANTASTIC VALUE, considering the price I paid.