First, you'll need to figure the length of the sheath you'll need. Be sure to account for how much the sleeving might compress to accept a larger diameter. It's possible to cut while it's on the wire but it's much more difficult. Special hot-blade cutting machines are sold for this material but it's not worth getting for a single job. We just whipped it with the flame from a lighter to ball the edges up a little bit. It will still unravel eventually, but it will hold up enough to get it on the wire.