A decorative jar candle holder and candle warmer in one, the Large Jar Candle Warmer works with standard apothecary jar candles up to 22 oz. to 26 oz. The inside diameter is approximately 4-1/8" and the inside height is approximately 4-1/2". The overall item is approximately 6" x 6". The time to melt a candle can vary by candle but is approximately 3 hours. Includes an on/off switch and indicator light. UL listed. Includes metal insides that conduct heat from the bottom heating unit.