A comprehensive guide of all devices: ScreenSizes.app
iPhone 4”: 320 x 568 pt
iPhone 4.7”: 375 x 667 pt
iPhone 5.5”: 414 x 736 ptiPhone 5.4” & 5.8”: 375 x 812 pt
iPhone 6.1” (2020): 390 x 844 ptiPhone 6.1” (2018–2019) & 6.5”: 414pt x 896 pt
iPhone 6.7”: 428 x 926 pt
If you want to be thorough, the 5.4” and 5.8” iPhone models also support a Display Zoom resolution of 320 x 693 pt, which I’m sure almost nobody actually tests their apps at