how to set width of image called by <a href=

[Josef Lowder]

.
What is the syntax to set the width of images that are to 
be called by a simple text list of images? 

Neither of these work: 

<a href="http://www.name.com/pix1.jpg" width=800>photo #1</a><br>
<a href="http://www.name.com/pix1.jpg width=800">photo #1</a><br>

The first example just opens the photo in its original size 
without resizing to the specified width. 

The second gives produces this message: 

Not Found
The requested URL /pix1.jpg width=800 was not found on this server.