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): 606 × 700 / 1331 × 1536 / 1774 × 2048 / 100 × 100 / 200 × 200 / 320 × 369 / 606 × 700 / 1386 × 1600 / 150 × 150 / 2112 × 2438