if you will always use the same size for images than, define the class in the css and assign a class while inserting the image.

you will define that class only once in css for example;

img.familypicture {
width: 400px;
height: 350px;
margin-bottom: 1px;
}

than use this class while inserting the image each time i.e;

<img src="http://www.mydomain.com/mypicture.jpg" class="familypicture" align="left" alt="image"/>