If the submit button, input text boxes or shopping cart images appear too Big or Small on the Thesis Theme then read the following:
The Thesis theme specifies the width of the input field in it's CSS which makes the input fields to have a specific size and causes this issue. You can override this CSS (our goal is to set the width to auto) by adding the following CSS to the custom CSS file that doesn't specify a fixed width so the button image size or input field is the actual size of the image or input field:
.custom .format_text input {
border-width:0.067em;
padding:0.2em;
width: auto;
}
So all you have to do is click on the "Custom File Editor" menu from your "Thesis Options" menu and paste the above piece of CSS code.