How to Increase the size of Column in Liferay?

By Default Size of Column(Data type String ) is 75..

If We Want Increase this size write the sentence like below in portlet-model-hints.xml under
docroot/WEB-INF/SRC/META-INF

                 <field name="description" type="String">

<hint name="max-length">500</hint>

</field>

and build service.xml once......