Hi @Nisha30,
To review what fields *may* be possible to use, check out the 'Field Labels' table found by typing 'Language File' under System Definition. From here you can filter by tables (Eg cmdb_ci) and get a quick snap shot of what fields are available for you....
However, can I ask, what is the resistance to creating a new field? One thing to consider, if you leverage an existing field that either is, or potentially can be used for something else other than it's intended design in the future, will this cause issues.
Off the top of my head, I can't think of any field providing a T-Shirt sizing option OOB (Out Of Box) for VM's or CI's, and I would be leaning towards creating my own field (at the correct level) to ensure I have full control and use of it.
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Thanks, Robbie
