Here are the sample grid sizes you can use for bootstrap:

Article body

<div class="row">
    <div class="articletext">
        <p>Article text goes here</p>
    </div>
</div>
 

2 columns inside an article body

<div class="row">
    <div class="articletext">
        <div class="row">
            <div class="col-md-6">COL1TEXT</div>
            <div class="col-md-6">COL2TEXT</div>
        </div>
    </div>
</div>
COL1TEXT
COL2TEXT

3 columns inside an article body

<div class="row">
    <div class="articletext">
        <div class="row">
            <div class="col-md-4">COL1TEXT</div>
            <div class="col-md-4">COL2TEXT</div>
            <div class="col-md-4">COL3TEXT</div>
        </div>
    </div>
</div>
COL1TEXT
COL2TEXT
COL3TEXT

Full page width

<div class="row">
    <div class="col-md-12">
        Full page content
    </div>
</div>

 

Two columns outside of article body

<div class="row">
    <div class="col-md-8 col-md-offset-2">
        <div class="row">
            <div class="col-md-6">
                COL1TEXT
            </div>
            <div class="col-md-6">
                COL2TEXT
            </div>
        </div>
    </div>
</div>
COL1TEXT
COL2TEXT