Worried about the ultrasound pic

Chinegwa

Hi guys, I'm as of today 12 weeks pregnant , I did a ultrasound yesterday and I was told I'm about 13weeks when I looked at the baby it looked small on the screen, I was told everything is good, I even saw the baby moving around and heard it heart bit....

But my question is if you look at the pic doesn't the baby look small?

Or is it because it wasn't zoomed it because he had a hard time making a pic the baby was moving to much