If you look you are using the iPhone 5 size layout in your storyboard file. To change the dimensions between iPhone 5 layout and the standard iPhone size
Click on the icon in the lower right hand corner of the storyboard:
Alternatively, if you want to see the layout in a iPhone 5 simulator. In the iOS simulator go to Hardware > Device > iPhone (Retina 4-inch). This is the iPhone 5 layout. However, if you do not have a retina displayed computer. The iPhone will look like a really big iPad.