4 million pixels effective 387 1488, pixel 2272X 1704. The size of the developable photo is 15X 1 1, and the diagonal is 19 inch.
3 million pixels effective 3 145728, pixel 2048X 1536. The size of the developable photo is 14X 10, and the diagonal is 17 inches.
2 million pixels are valid at 1920000, and the pixel is 1600X 1200. The size of the developable photo is 1 1X8, and the diagonal is 13 inch.
1.3 million pixels effective 1228800, pixel 1280X960. The developable photo size is 9X6, diagonal 1 1 inch.
800,000 pixels, effective 786,432, pixel 1024X768. Developable photo size 7X5, diagonal 9 inches
500,000 pixels, 480,000 pixels, 800X600 pixels. The developable photo size is 5X4, and the diagonal is 7 inches.
300,000 pixels are effective, 307,200 pixels are 640X480. Developable photo size 4X3, diagonal 5 inches
As you can see, a 3-megapixel photo can develop a 17-inch photo, but the above standards are all based on digital cameras, and there is no comparison between mobile phones and digital cameras, so you can develop a 5-inch photo, which is as big as the photos in our family photo album.