Choose from many photo sizes, iPhone resolution to wide and HD, including full size image. See it larger for more details:
Different image sizes (resolution): 642 × 700 / 1409 × 1536 / 100 × 100 / 200 × 200 / 320 × 349 / 642 × 700 / 1468 × 1600 / 150 × 150 / 1835 × 2000