Hi,

For me I normally set the length only base on my estimation on how large the table probably will grow.
The larger the lengthier, things like 10, 12, 16, 24 or even 32 chars in length.

I wonder what are the key factors everyone else is considering when trying to determine the length of a GUID field (let say it is used as primary/surrogated key field of tables).

Is there any good article out there discussing how should one decide the length of a GUID field (be it a sequential one or non-sequential)?