Need help trying to get this jpeg. to fit correctly

Hello, this is my first time posting here.
Im hoping i can get a little help in getting the code correct to fit a jpeg. correctly in the margin/border.

The Problem im having, is where the jpeg. is going, there is an invisible margin/border, thats not allowing it to stretch to the full size.
The margin/border is all across the top horizontally, and all across the right side vertically.

I can post a url of where the image is (its a website, im not sure if im allowed to post it, so im sorry if ive done something wrong. Please feel free to change my post around if ive broken any rules)
https://www.hatzijewellers.com.au
The image is on the home page, its called the “Online Store now open”.
Ive managed to centre it so the margin/border looks equal everywhere. Changing the size of the image doesnt help. Ive tried that.
The code ive put is:

<span><img class=”alignnone size-full wp-image-2372″ title=”Hatzi jewellery” src=”https://hatzijewellers.com.au/wp-content/uploads/2012/10/Hatzi-online-Store.jpg&#8221; alt=”” width=”470″ height=”120″</span>

What can i do to get it to fit in correctly?
Thank you so much, and i appologise if my post on here is all over the place.
Thank you.