Bootstrap 4 - Column Form Label with max width

I'm building a form in a full-width fluid layout with 2 columns, the label column and the inputs column.

the problem is because it is a fluid layout with wide screens a col-2 label is too big and col-1 is too small.

is there a way to give a max width to the col-form-label column or do i need to create some custom CSS for this columns?

simple demo : https://codepen.io/seltix/pen/aWgVjR

<div class="formcontainer">
  
  <div class="form-group row">
    <label class="col-12 col-lg-2 col-form-label">Label</label>
    <div class="col-12 col-lg-10">
      <input class="form-control" type="text" value="">
    </div>
  </div>
  
  <div class="form-group row">
    <label class="col-12 col-lg-2 col-form-label">Longer label</label>
    <div class="col-12 col-lg-10">
      <input class="form-control" type="text" value="">
    </div>
  </div>
  
  <div class="form-group row">
    <label class="col-12 col-lg-2 col-form-label">Longer label (extra)</label>
    <div class="col-12 col-lg-10">
      <input class="form-control" type="text" value="">
    </div>
  </div>
  
</div>

bootstrap 4 form source: https://v4-alpha.getbootstrap.com/components/forms/#textual-inputs

Solution

The max-width of col-lg-2 in bootstrap 4 is 16.6667%, and the screen size boundary is min-width: 992px. What you want to do is override the maximum width of those columns in that view using your custom class like this:

CSS

/* Not too wide */
    @media(min-width: 992px) {
      .col-percent-13 {
           max-width: 13% !important;
      }
    }

/* A little bit narrower */
    @media(min-width: 992px) {
          .col-percent-11 {
               max-width: 11% !important;
          }
        }

Example HTML

<!-- I want all the labels in this form to have a width of 13% -->
  <div class="form-group row">
    <label class="col-12 col-lg-2 col-form-label col-percent-13">Label</label>
    <div class="col-12 col-lg-10">
      <input class="form-control" type="text" value="">
    </div>

<!-- In another form, I want all the labels to be 11% wide -->
  <div class="form-group row">
    <label class="col-12 col-lg-2 col-form-label col-percent-11">Label</label>
    <div class="col-12 col-lg-10">
      <input class="form-control" type="text" value="">
    </div>

Modify the width values and class names to your preference.