Tube candle refills are offered in the sizes most commonly specified by tube manufacturers - they are designed to fit inside altar tubes.If you do not know the size you need, please see our candle sizerDiameterLengthMaterialEnd TypeCandles/Box17/32"7"51% BeeswaxPlain End10017/32"7"StearinePlain End1007/8"8"51% BeeswaxPlain End361-1/2"5-1/2"51% BeeswaxPlain End121-1/2"9"51% BeeswaxPlain End12