what are iphone 4.7in and 5.5in screen shot dimensions?

You may find this info useful too, taken from Andy Orsow's article (thank you buddy!) What are the iOS screen sizes?:

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The sizes below include the iOS status bar area, so be sure to leave room for that in your designs. See the bottom of this article for status bar information.

Remember, mobile projects can scroll, so the screen heights listed below are simply minimum heights for your designs.

Phones

iPhone 6 Plus
Portrait: 1242 x 2208 (Launch Image: iPhone Portrait iOS8 – Retina HD 5.5)
Landscape: 2208 x 1242 (Phone Landscape iOS8 – Retina HD 5.5)

iPhone 6
Portrait: 750 x 1334 (iPhone Portrait iOS8 – Retina HD 4.7)
Landscape: 1334 x 750

iPhone 5, 5S, 5C
Portrait: 640 x 1136 ("iPhone Portrait iOS5,6 – Retina 4" and "iPhone Portrait iOS7,8 – Retina 4")
Landscape: 1136 x 640

iPhone 4, 4S
Portrait: 640 x 960 (iPhone Portrait iOS5,6 – 2x and iPhone Portrait iOS7,8 – 2x) Landscape: 960 x 640

iPhone 1, 2, and 3
Portrait: 320 x 480 (iPhone Portrait iOS5,6 – 1x)
Landscape: not supported

Tablets

iPad Air / Retina iPad
Portrait: 1536 x 2048 (iPad Portrait iOS 7-9 - 2x)
Landscape: 2048 x 1536 (iPad Landscape iOS 7-9 - 2x)

iPad Mini
Portrait: 1536 x 2048 (iPad Portrait iOS 7-9 - 2x)
Landscape: 2048 x 1536 (iPad Landscape iOS 7-9 - 2x)

iPad - Non Retina
Portrait: 768 x 1024 (iPad Portrait iOS 7-9 - 1x) iOS 5,6?
Landscape: 1024 x 768 (iPad Landscape iOS 7-9 - 1x) iOS 5,6?

Wearables

Apple Watch
42mm: 312x390px
38mm: 272x340px

Status Bar Info

InVision will overlay a status bar on your designs for you, so including it in your design is up to you. However, you’ll want to make sure you account for the status bar at the top of your screen.

At the top of your design, leave room for:

iPhone 6 Plus: 60px height

iPhone 4–6: 40px height

iPhone - Non retina: 20px height

Retina iPads: 40px height

Non-retina iPads: 20px height

If you don't want to include the status bar in your designs, check the box for “My design starts below the status bar” in your project options.

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EDITED: I had to add Launch Images to my app, and I was not able to find info how simulators correspond to Apple's image names in Launch Images assets. I found such info at http://www.ios-developer.net/iphone-ipad-programmer/icons_and_graphics/default-image and added here.

Updated for the new iPhones 11, 11 Pro, 11 Pro Max, X🅁, X🅂, X🅂 Max and X.

Size for iPhone 11 Pro Max with @3x scaling, coordinate space: 414 x 896 points and 1242 x 2688 pixels, 458 ppi, device physical size is 3.06 x 6.22 in or 77.8 x 158.0 mm. 6.5" Super Retina XDR display.

Size for iPhone 11 Pro with @3x scaling, coordinate space: 375 x 812 points and 1125 x 2436 pixels, 458 ppi, device physical size is 2.81 x 5.67 in or 71.4 x 144.0 mm. 5.8" Super Retina XDR display.

Size for iPhone 11 with @2x scaling, coordinate space: 414 x 896 points and 828 x 1792 pixels, 326 ppi, device physical size is 2.98 x 5.94 in or 75.7 x 150.9 mm. 6.1" Liquid Retina HD display.

Size for iPhone X🅂 Max with @3x scaling (Apple name: Super Retina HD 6.5 display"), coordinate space: 414 x 896 points and 1242 x 2688 pixels, 458 ppi, device physical size is 3.05 x 6.20 in or 77.4 x 157.5 mm.

let screen = UIScreen.main
print("Screen bounds: \(screen.bounds), Screen resolution: \(screen.nativeBounds), scale: \(screen.scale)")
//iPhone X🅂 Max Screen bounds: (0.0, 0.0, 414.0, 896.0), Screen resolution: (0.0, 0.0, 1242.0, 2688.0), scale: 3.0

Size for iPhone X🅁 with @2x scaling (Apple name: Super Retina HD 6.1" display), coordinate space: 414 x 896 points and 828 x 1792 pixels, 326 ppi, device physical size is 2.98 x 5.94 in or 75.7 x 150.9 mm.

let screen = UIScreen.main
print("Screen bounds: \(screen.bounds), Screen resolution: \(screen.nativeBounds), scale: \(screen.scale)")
//iPhone X🅁 Screen bounds: (0.0, 0.0, 414.0, 896.0), Screen resolution: (0.0, 0.0, 828.0, 1792.0), scale: 2.0

Size for iPhone X🅂 and iPhone X with @3x scaling (Apple name: Super Retina HD 5.8" display), coordinate space: 375 x 812 points and 1125 x 2436 pixels, 458 ppi, device physical size is 2.79 x 5.65 in or 70.9 x 143.6 mm.

let screen = UIScreen.main
print("Screen bounds: \(screen.bounds), Screen resolution: \(screen.nativeBounds), scale: \(screen.scale)")
//iPhone X🅂 and X Screen bounds: (0.0, 0.0, 375.0, 812.0), Screen resolution: (0.0, 0.0, 1125.0, 2436.0), scale: 3.0

Size for iPhone 8 Plus (6, 6s, 7 and 8 Plus) with @3x scaling (Apple name: Retina HD 5.5), Coordinate space: 414 x 736 points and 1242 x 2208 pixels, 401 ppi, screen physical size is 2.7 x 4.8 in or 68 x 122 mm.

Size for iPhone 8 (6, 6s and iPhone 7) with @2x scaling (Apple name: Retina HD 4.7), Coordinate space: 375 x 667 points and 750 x 1334 pixels, 326 ppi, screen physical size is 2.3 x 4.1 in or 58 x 104 mm.

And iPhone 5 for comparison is 640 x 1136, iPhone 4 640 x 960.

Note: To build Apps that utilize the full screen size of the new phones add LaunchImages in the sizes: 1242 x 2208, 2208 x 1242 and 750 x 1334. The size in simulator will be different before these LaunchImages are added, because older Apps are scaled.

This should be a comment to Mixaz's answer but I don't have the rep for that yet. Interestingly enough, from Full resolution screenshots for Iphone 6 and 6+

I just figured this out. In Settings > Display & Brightness, you have to have the setting of Standard. I had my device set to zoomed. With "Zoomed" you get 640x1136 screen grabs. With "Standard", you get 750x1334. Not obvious to me! – Chris Prince Nov 18 '15 at 5:03