Bootstrap CSS class .col-md-1

    <div class="container">
        <div class="row bg-secondary">
            <div class="col-auto col-md-1 bg-warning p-3">
                col-md-1
            </div>
            <div class="col-2 bg-primary p-3">
                col-2
            </div>
            <div class="col-2 bg-info p-3">
                col-2
            </div>
        </div>
    </div>