How large is a CBT backup?

Hi folks,

 

a customer asked me today how large a CBT backup is and where he can find this information.

 

For NetWorker every vProxy backup is a FULL with or without leveraging the VMware CBT feature. But is it mentioned in any log on the vProxy or maybe on the Data Domain how much data was transferred during a CBT-backup?

 

Cheers,

beacon.