The 6 Pro is the flagship model with a 6.7" screen ... See Tensor chip. Although the Pixel 5a screen is slightly larger than the 5, the 5a was downgraded a bit to be the entry level model.

Google Pixel 8a vs Google Pixel 5a, respectively – Screen size: 6.1-inch OLED display (120Hz, HDR, 2,000 nits) 6.34-inch OLED display (60Hz, HDR) – Display resolution: 2400 x 1080 – SoC ...

Pixel 5a, Pixel 6 and 6 Pro, Pixel 6a, and Pixel 7 and 7 Pro. Google's Android Developers Blog post reveals a few of the new additions in Android 14. Among them is a new on-screen back arrow.