{
  "1:1": {"width": 1024, "height": 1024},
  "4:3": {"width": 1152, "height": 896}, 
  "3:2": {"width": 1216, "height": 832},
  "16:9": {"width": 1344, "height": 768},
  "21:9": {"width": 1536, "height": 640},
  "3:4": {"width": 896, "height": 1152},
  "2:3": {"width": 832, "height": 1216},
  "9:16": {"width": 768, "height": 1344},
  "9:21": {"width": 640, "height": 1536}
}