Why you Need to Use Height and Width Tags?

SEO and SPEED As I mentioned before, every standards-compliant, Google-sensitive image reference should contain 5 key items:

1. A src attribute specifying the URL of the image
2. A width declaration in which the width of the image is specified in pixels
3. A height declaration in which the height of the image is specified in pixels
4. An alt attribute that describes the content of the image—this is the #1 element of image-oriented SEO
5. A title attribute that contains text to be displayed when the user hovers his/her mouse over the image

As far as I knew the width and height tags were necessary for the google image indexing only. Daniel has pointed to another advantage of using these tags:

When the height and width tags are included the browser will automatically know the size of the image. As a consequence it will be able to hold a place for the image and load the rest of the page contemporaneously. If the browser does not see those tags it will need to figure the size of the image, then load the image and then load the rest of the page.

example

It is very simple to set an image the width and height tags.