The cover display is rumored to grow to 3.4", so it will show a lot more content than the Z Flip4 display, but it will still be smaller than the Razr 40 Ultra display.
Samsung Galaxy Unpacked July 2023: Z Flip 5, Z Fold 5, and all the news - The Verge
Samsung Galaxy Z Flip 5 to have a much bigger cover display - SamMobile
Samsung Galaxy Z Flip 5 Hands-On: Bigger Display, More Personal Customizations - CNET
The Galaxy Z Flip 5 has a 3.8-inch Cover Display, Only 16% Larger Than the Cover Display Found on the Oppo Find N2 Flip, Claims Industry Specialist
Galaxy Z Flip 5 Review: Its Big Cover Screen Disappoints
Samsung Galaxy Z Series - External Reviews
Samsung Galaxy Z Flip 5 vs. Galaxy S23+: To fold or not to fold
Samsung Galaxy Z Flip 4 vs Galaxy Z Flip 3 - PhoneArena
Galaxy Z Flip 5 outer display tipped to be much larger
Samsung Galaxy Unpacked July 2023: Z Flip 5, Z Fold 5, and all the news - The Verge
Samsung Galaxy Z Flip 5 Review
What are the specs of the Samsung Galaxy Z flip? - Quora
Samsung Galaxy Flip 4 And Flip 5 Comparison Review