change image size in template

I have Change the Content-page.php where I have inserted a Image on the top right side but I want to Change the Image to a bigger height.
But the Image doesn’t become bigger.
the URL for the site is:
I have inserted the following Code beside the <h1>

<div id="box1"><img src="" height="150px" /></div>

the css for box1 is

#box1 {
  top: -120px;
  left: 200px;

when I Change the height of the Image it wiill not be bigger.
Therefore I will ask how I can get the Image bigger.
kindly regards.

Hello there,

I hope you are doing well today.

You can use the following CSS code to change the image height by going to Appearance > Customize > Additional CSS and pasting it there.

/*Change contact image height*/
div#box1 img {
    height: 175px;
    width: auto;

Best Regards,

Kindly regards for your answer.
this work perfect.
kindly regards

Hello there,

I am glad the solution worked for you.
Please feel free to contact us again in the future regarding any other issues.

Best Regards,