This plugin is outdated and might not be supported anymore
Custom CSS for Pages and Posts

Custom CSS for Pages and Posts

Details
View on WordPress

This plugin adds a metabox to all post and page edit screens ( and optionally to
custom post type edit screens ) that allows the user specify custom CSS for that
page or post. All it does is wrap your CSS in tags
and then inserts the block into the section of your page/post. Pretty simple.

Details

Plugin code:
custom-css-for-pages-and-posts
Plugin version:
1.1
Outdated:
Yes
WP version:
3.5 or higher
PHP version:
or higher
Test up to WP version:
3.6.1
Total installations:
300
Last updated:
2013-09-20
Rating:
Times rated:
7
css