HTML with Images - unwanted image scaling problem

[Dime358]

When HTML contains images they are scaled up by ~20% when converting to PDF.

Image 1:

This is the desired look when generating (taken from HTML template)

Image 2:

This is the result i am getting

When HTML is opened in browser it looks like example 1 as it should be.
The < img > tag have height and width attributes and this is occurring every time image is present in the HTML.