As a general rule, our 5 oz diffusers last for 3-4 months.
Our reed diffuser gift set with 3 bottles of 2 oz essential oil lasts for 1.5-2 months (each bottle).
For our soy wax candles, the 13 oz (370g) three-wick candle can last for 75 hours of burn time.
And our travel candles gift set (3 candles, 2.5 oz or 70g each) can each last for 14 hours of burn time.