Source 1920 x 1440
First Image - Checked the HiDPI flag on the image which sets the width to 1/2 (960 px)
- Make an image HiDPI: When you check this box, this setting will set your image at half its pixel width. So, an image that’s 600px wide will be displayed at 300px. This pixel density will ensure the image looks great on most mobile devices that have HiDPI displays.