How to get a plugin to parse inside playa tags?

{nieuwsbrief_producten}
                    <table border="0" cellspacing="0" cellpadding="0">
                         <tr>
                              <td align="left" valign="top">{exp:imgsizer:size src="{producten_foto}" height="200" alt="{title}"}</td>
                              <td>
                                   <h2>{title}</h2>
                                   {exp:char_limit total="100"}
                                   {producten_omschrijving}
                                   {/exp:char_limit}
                              </td>
                         </tr>
                    </table>
                    {/nieuwsbrief_producten}