t">
<div class="grid__col-5">
    5
</div>
<div class="grid__col-7">
    7
</div>
</div>

<div class="grid--default">
<div class="grid__col-6">
    6
</div>
<div class="grid__col-6">
    6
</div>
</div>

<h3>$flexbox-grid-mixins-box-sizing: border-box;</h3>

<div class="grid--border-box">
<div class="grid__col-12">
    12
</div>
</div>

<div class="grid--border-box">
<div class="grid__col-1">
    1
</div>
<div class="grid__col-11">
    11
</div>
</div>

<div class="grid--border-box">
<div class="grid__col-2