How can I view the total number of leads in a specific Dialer Campaign?

To view the total number of leads in a dialer campaign (that meet the filters set), navigate to Manage --> Dialer Campaigns, click the View Leads Count button for the campaign, and the total will appear next to the dialer campaign name.

NOTE:  This is the total number of leads that meet the campaign filters, not necessarily the number of leads that the user(s) are eligible for.