How to apply style classes to td elements?

What I am trying to find out is the proper syntax to apply some style to each individual td in my table below:

<section id="shows">
<!-- HTML5 section tag for the shows 'section' -->

<h2 class="gig">Shows</h2>

<ul class="gig">

    <!-- Start the table -->
    <table>
        <tr>
            <!-- Setup the header row -->
            <th>When</th>
            <th>Where</th>
            <th>Start</th>
            <th>Finish</th>
        </tr>

        <?php
            // some PHP to fetch all the gig entries from the shows table
            $shows_query = "SELECT * FROM shows ORDER BY date ASC";
            $shows = mysql_query($shows_query);
            // a loop to place all the values in the appropriate table cells
            while ($show = mysql_fetch_array($shows)){
            //begin the loop...
            ?>

        <!-- Start the row -->
        <tr>

            <!-- Format the date value from the database and print it: -->
            <td class="when"><?php 
            $date = date("l, F j, Y", strtotime($show['date'])); 
            echo "$date";
            ?></td>

            <td class="venue"><?php
            echo $show['venue'];
            ?></td>

            <!-- Format the start and end times and print them: -->
            <td class="start"><?php
            $time = date("G:i", strtotime($show['time'])); 
            echo "$time";
            ?></td>

            <td class="finish"><?php
            $until = date("G:i", strtotime($show['until']));
            echo "$until";
            ?></td>

            <!-- Finish this row -->
        </tr>

        <!-- Some space before the next row -->
        <div class="clear"></div>

        <?php 
            // close the loop:
             }
             ?>
        <!-- Finish the table -->
    </table>
</ul>

</section>

The styling that I have at the moment is:

#shows table.gig { font-size: 25px; }
#shows td.finish { margin-left: 50px;}

I did have a class for the table itself but not sure if it’s necessary.

The font-size works but what I can’t figure out is how to apply the style to the td, th, tr elements etc. I have tried several things but can’t seem to get it to work!

Answer

Give the table a class name and then you target the td‘s with the following:

table.classname td {
    font-size: 90%;
}