select.setInputPrompt("Font size");
select.setDescription("Font size");
select.setImmediate(true);
select.setNullSelectionAllowed(false);
select.setNewItemsAllowed(false);
select.addValueChangeListener(new ValueChangeListener() {
@Override
public void valueChange(ValueChangeEvent event) {
// Get the new font size
Integer fontSize = (Integer) select.getValue();