html – Bootstrap how do I change width of input in input group

I can’t find a way to change the width of this input group

    <div class="input-group">
        <input type="text" class="form-control" placeholder="Room code here...">
        <span>
            <button class="btn btn-success" href="NONE">
                <i class="fas fa-chevron-right"></i>
            </button>
        </span>
      </div>

I tried doing w-50 on the class=”form-control” but it made no difference. I want to achieve, for example, make the button and the input bar the same size in width.