Apple is reportedly working on the iPhone 17 series. The series will launch officially in the month of September this year. The iPhone 17 series is expected to bring some notable changes. For the first time, we will be getting a new ‘thin and lightweight’ iPhone, dubbed the iPhone 17 Air. And now, a new leak suggest that the vanilla iPhone 17 will get a larger screen size compared to its predecessor.
iPhone 17 may have 6.3-inch display as per Spigen
Spigen, a popular smartphone cover and screen protector company, mistakenly exposed the larger display size of the iPhone 17 in a product listing on Amazon India. The Spigen EZ FIT tempered glass, initially designed for the iPhone 16 Pro with a 6.3-inch display, has been updated to be compatible with the iPhone 17. (The page is now updated, and the mention of iPhone 17 has been removed)

Though this does not directly confirm the screen size of the iPhone 17, it is impossible for a 6.3-inch screen size tempered glass to fit-in a 6.1-inch screen.
Early rumors say that the upcoming iPhone 17 will include the ProMotion 120Hz high refresh rate display. Other projected characteristics include an Apple A19 chipset based on 3nm finfet technology. It will receive 8GB of RAM. The camera configuration will most likely remain similar to its predecessor.