int size

Source 

@DomName('HTMLSelectElement.size')
@DocsEditable()
int get size => _blink.BlinkHTMLSelectElement.instance.size_Getter_(this);
void size=(int value)

Source 

@DomName('HTMLSelectElement.size')
@DocsEditable()
set size(int value) =>
    _blink.BlinkHTMLSelectElement.instance.size_Setter_(this, value);