Any chess set sold by House of Chess is recommended for tournament use - provided it's not in the "themed" section and king height must be more than or equal to 3.75 inches and square size of board should be of 2 to 2.5 inches. You'll quickly find 3 or 4 chess sets that hold a special attraction. From there the best rule of thumb is to buy the best set you can afford. Remember, a good chess set will provide years of enjoyment and be the field of countless battles. Spend a little extra now and you'll be rewarded with a lifetime of enjoyment!