How to change the width of my dropdown list?

I have dropdown lists in my form -- however, when I put a sublabel, the width of the field with dropdown list is no longer the same as the other fields. I've set the width to 150px which is the same as the other fields.

Is it possible to have the same width for all fields?

You can resize your dropdown fields to 150px using this custom css code.

#input_7{
  width: 150px!important;
 
}
#input_12{
  width: 150px!important;
 
}

Here is a guide on how to insert custom css to your form.

How-to-Inject-Custom-CSS-Codes