Keeping original file size when outputting to MP4

[fin5CAB]

Hi, I am working on Premier Pro of a windows system. I have raw footage from a sony A7 shot at 1080 at 25 frames per second. When I am trying to edit it and output, it is coming out at a much smaller size and the quality is grainy, nearer 640. I have tried to chnage it in the output but has not worked.

How can I keep the file size the same as when I input it?

[Ann Bens]

Please do not call it raw as its not. Better word would be source footage.

Post screenshot export settings with left tab to output with an image (not black).

[Christian.Z]

Also a screenshot of your sequence settings