Number of characters returned by converting to hex?

I have a string field of size 20 chars. If i convert this string to a hex equivalent. What is the maximun numbers of characters that this hex equivalent can be?.
i.e. what is the maximum size that the new string can be?
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Venci75Connect With a Mentor Commented:
the char is 2 bytes (unicode)
you need 2 hex symbols for each byte
20 * 4 = 80
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