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): 54 × 96 / 225 × 400 / 394 × 700 / 864 × 1536 / 1152 × 2048 / 100 × 100 / 200 × 200 / 270 × 480 / 394 × 700 / 150 × 150 / 1440 × 2560