How to change the width of a drop-down field in a django form using widget attributes not css

I am trying to make all of the fields in my Django form have the same size to look tidy. I have text input, drop down and text area. I am creating the form using the Ticket model so I am not defining the form fields explicitly. I was able to resize the text input, but what is the attribute in a drop-down field that controls the width? Note that the choices in the drop-down are basically foreign keys from another table that are defined in the model.

class NewTicket(forms.ModelForm):

    class Meta:
        model=Ticket

        fields = ('subject','business','project','description')

        widgets={
            'subject': forms.TextInput(attrs={'size': '20px'}),
            'business': forms.Select(attrs={'size': '20px'}) #this line does not work
            }

I know you said no CSS but is this an option?

class NewTicket(forms.ModelForm):

    class Meta:
        model=Ticket

        fields = ('subject','business','project','description')

        widgets={
            'subject': forms.TextInput(attrs={'style': 'width:20px'}),
            'business': forms.Select(attrs={'style': 'width:20px'})
            }