I am meaning to ask about how to say 'yours, (name)' as in 'I am yours' in English. Is it the same as only δικό σας or not?
The literal translation of "yours" in Greek is "δικός σου" (singular) or "δικός σας" (plural, more polite). However it is not a common way to end a letter or email this way in Greek.
Here is a post on ending letters/emails in Greek: