You can alter the image size by attaching: height="300" to the image address, not width.
Width or height work the same. Either will resize the pic.
You can use height="xxx", width="xxx", or you can use percentages, such as width="50%" which will resize the image automatically to that percentage of the browser window size, and change as the browser window size changes.
But none of them work when you inadvertently put an > after the url and before the size command, like I did in the first post.