Unfortunately there isn’t any specific guide how to resize images to be in pair with text. You will have to do it by your self.
But easy way to resize is to put width and height directly to your images.
You can add this at end of img tag: width="250" height="250"
Here is full example how you can put it:
<img src="http://pixel-industry.com/wordpress/elvyre/wp-content/uploads/2014/05/servicesdevices.png" alt="services" class="float-left" width="250" height="250" >
For padding you will need to add style to the picture, if you want padding on the left side you will need to add:style="padding-left: 20px;"
For the right side you will need to add:style="padding-right: 20px;"
Here is full example of image with fixed dimensions and padding right:
<img src="http://pixel-industry.com/wordpress/elvyre/wp-content/uploads/2014/05/servicesdevices.png" alt="services" class="float-left" width="250" height="250" style="padding-right: 20px;" >
Hope this will help you out.
Danijel
