What are the screenshot and graphic size requirements on Google Play?
App icon: 512 x 512 px 32-bit PNG. Feature graphic: 1024 x 500 px. Phone screenshots: between 320 px and 3,840 px per side, JPEG or 24-bit PNG, 2–8 per type. You can also add 7-inch and 10-inch tablet screenshots. A feature graphic is required for your app to be eligible for featuring on Play.