The cuttings will not be able to sustain too many leaves so remove those nearer the bottom of the stem, leaving no more than half a dozen or so of the much smaller top leaves.
Sometimes the cutting does not leave you much selection as to how much leaf you leave on. There may only be tiny ones at the budding end of the cutting or otherwise very large ones to choose from.
If you want intermediate sized leaves you can simply trim a couple of the larger ones with a pair of scissors. You can see how the rightmost cutting could possibly be trimmed in the photograph. The leftmost cutting showing how that's been done.
Note that this technique of leaf trimming is also an idea if you are either acclimatising a newly received plant or thinking of re-potting a plant. Say for example I have sent you a plant and your conditions are a bit drier than mine are, or the plant is simply in slight shock from the journey.
Plants often appear a little droopy after being unpacked, and usually pick up on their own after a little while. To stop them getting over-stretched I'll usually trim a few leaves before sending. However, if you feel a plant is not picking up too well, or you simply want to further reduce the strain on it, then trimming one or two more of the bigger leaves in this way will ensure that it's not pushed beyond itís means. Like I say, leaf trimming is also a good idea before re-potting.