We have discovered over our years of burning and making candles that the wider the opening on the mouth of the jar, the better the scent disbursement will be. So; choose smaller jars for smaller rooms (i.e. 6 oz Honey Pots, 4 oz tins), medium jars for medium sized rooms (i.e. 8 oz Metro, 10 oz Honey Pots), and our larger jars for larger rooms (any frosted apothecary, 18 oz Honey Pots). For extreme scented alternatives try selections from our Wickless Alternatives line.