<div class="md-form input-group">
    <input type="text" class="form-control" placeholder="Height" aria-describedby="basic-addon2">
    <span class="input-group-addon" id="basic-addon2">CM</span>
</div>

<div class="md-form input-group">
    <input type="text" class="form-control" placeholder="Weight" aria-describedby="basic-addon2">
    <span class="input-group-addon" id="basic-addon2">LBS</span>
</div>