The code displays the actual image dimension. If you want a smaller image, please update the code and use this:
jQuery('<a href="http://yaakvalley.org/programs/pacific-northwest-trail-route/" class="x-brand img" title="Protect Restore Connect"><img src="http://yaakvalley.org/wp-content/uploads/pnt1.jpg" alt="Proposed Pacific Northwest Trail Route" style="max-width: 120px;"></a>').insertBefore('a.x-brand');
Please take note of the
max-width: 120px;. You can increase or decreased the size of the image which suites your site design.
We would loved to know if this has work for you. Thank you.