TinyMCE style for Mosaic TTW?

Is it possible to add a TinyMCE style for Mosaic (rich text) for larger paragraph text TTW (Plone 5.2).

So, basically I want something like:

<p>Normal text</p>
<p class="larger">Bigger text</p>

Alternatively

<p><span class="larger">larger</span></p>

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