Hello Stephanie, thanks for purchasing Thefox!

To change the excerpt length for the grid blog type the easiest way is to add a custom functions to the functions.php file, would be nice to use a child theme for your case.

What you need to add :

function custom_excerpt_length( $length ) {
	return 20;
}
add_filter( 'excerpt_length', 'custom_excerpt_length', 999 );

Then change 20 to the number of word you want to use.

Do not hesitate to contact us if you have more questions.

Regards.

You're welcome!

Do not hesitate to contact us if you have more questions.

Regards.