Candle sleeves have been made in various sizes over time.
If you are only going to replace your candle sleeves (and not the candle fittings): measure the outer diameter of the fitting very precisely.
Please measure precisely, millimeters can make a difference.
And then make sure that the inner diameter of the new candle sleeve is slightly larger.
As for the length of the candle sleeve, you can easily shorten it.
So a little too long is not a problem. A candle sleeve that is too short is not convenient.
Here you will find chandelier light fittings , if you want to replace them right away as well.