AFAICT the spec does not exclude zero-size images, which would make the smallest image 22 bytes (14 bytes header + 8 byte end marker). Otherwise the pixel in a

AFAICT the spec does not exclude zero-size images, which would make the smallest image 22 bytes (14 bytes header + 8 byte end marker). Otherwise the pixel in a 1x1 image can be encoded in 1 byte, giving 23 bytes total.