Font size in DropDownByIndex selection list (WebDynpro ABAP)

Hi,

How can I change the font size of the DropDownByIndex selection list? I was able to chage the font of the selected value by using custom style class, like this

ls_prop-name = 'fontSize'.
ls_prop-VALUE = '20px'.
APPEND ls_prop TO lt_prop.
CLEAR ls_prop.


wd_comp_controller->m_custom_style_manager->add_custom_style(
wd_comp_controller->m_custom_style_manager->create_custom_style(
style_class_name = `dropDown`
library_name = 'STANDARD'
element_type = 'DROPDOWN_BY_IDX'
style_properties = lt_prop ) ).

but the result looks like this.

I'd like to see all text sizes increased,

Br,

Pekka