Vertical alignment in Bootstrap 4

You can use the flex-xs-middle class like this..

Bootstrap 4 Alpha 5

<div class="container-fluid">
    <div class="row">
        <div class="col-xs-6">
            <div class="circle-medium backgrounds"></div>
        </div>
        <div class="col-xs-6 flex-xs-middle">
            <div class="name">Supplier</div>
        </div>
    </div>
    <div class="row">
        <div class="col-xs-6">
            <div class="circle-medium backgrounds"></div>
        </div>
         <div class="col-xs-6 flex-xs-middle">
            <div class="name">Supplier</div>
        </div>
    </div>
</div>

http://www.codeply.com/go/PNNaNCB4T5 (Using the Bootstrap 4 flexbox enabled CSS)

Bootstrap 4

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UPDATE for Bootstrap 4.0.0

Now that Bootstrap 4 is flexbox by default there are many different approaches to vertical alignment using: auto-margins, flexbox utils, or the display utils along with vertical align utils. At first “vertical align utils” seems obvious but these only work with inline and table display elements. Below are the Bootstrap 4 vertical centering options. Remember, vertical alignment is relative to parent height.

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1 – Vertical Center Using Auto Margins:

Another way to vertically center is to use my-auto. This will center the element within it’s container. For example, h-100 makes the row full height, and my-auto will vertically center the col-sm-12 column.

<div class="row h-100">
    <div class="col-sm-12 my-auto">
        <div class="card card-block w-25">Card</div>
    </div>
</div>

Vertical Center Using Auto Margins Demo

my-auto represents margins on the vertical y-axis and is equivalent to:

margin-top: auto;
margin-bottom: auto;

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2 – Vertical Center with Flexbox:

Since Bootstrap 4 .row is now display:flex you can simply use align-self-center on any column to vertically center it…

       <div class="row">
           <div class="col-6 align-self-center">
                <div class="card card-block">
                 Center
                </div>
           </div>
           <div class="col-6">
                <div class="card card-inverse card-danger">
                    Taller
                </div>
          </div>
    </div>

or, use align-items-center on the entire .row to vertically center align all col-* in the row…

       <div class="row align-items-center">
           <div class="col-6">
                <div class="card card-block">
                 Center
                </div>
           </div>
           <div class="col-6">
                <div class="card card-inverse card-danger">
                    Taller
                </div>
          </div>
    </div>

Vertical Center Different Height Columns Demo

Important: The direct parent of the element to be aligned must have a defined height!

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3 – Vertical Center Using Display Utils:

Bootstrap 4 has display utils that can be used for display:table, display:table-cell, display:inline, etc.. These can be used with the vertical alignment utils to align inline, inline-block or table cell elements.

<div class="row h-50">
    <div class="col-sm-12 h-100 d-table">
        <div class="card card-block d-table-cell align-middle">
            I am centered vertically
        </div>
    </div>
</div>

Vertical Center Using Display Utils Demo