Obviously this depends on where you want to make this change, but you can add something along the lines of...
.cp_name_of_custom_field { font-size:20px }
to your styles.css file
Obviously this depends on where you want to make this change, but you can add something along the lines of...
.cp_name_of_custom_field { font-size:20px }
to your styles.css file
You may also use the Wordpress plugin WordPress › WordPress Firewall 2 « WordPress Plugins as a first line of defense against intruders.