Width of a picker

Hi,

I am trying to set the width of a picker with the HorizontalOptions property to CenterAndExpand or FillAndExpand but the width of the picker is the width of the tittle text.

For example, my picker has a title of "Country" and I select a country called "Dominican Republic". In the page, I only can see the "Dominic" because the witdth is limitated.

How can i do to set the size of a picker to the max available space?

thanks in advance