The sizes and voltage rating should be stamped on the capacitor.

Should be printed on the side. The number will be something microfarads. It will typically be abbreviated MFD or sometimes with the Greek letter mu.

{{gwi:1568671}}

That or take the old one with you to your local supplier.

The voltage rating of the replacement capacitor could be a higher voltage rating than the original but not lower and the capacitance rating or ratings, for multiple caps in 1-package, should be the same as the original.

SR

The capacitance can be marginally higher without problem.

The voltag4e MUST beat least the same or higher.