In JIRA Agile 6.3 the text in the Agile Sprint Health gadget for the board name had font-size 14px, in JIRA Software 7.0.10 its now 24px.
Inspecting the html, it seems in v7 there's an <h1> header inserted just before the <span class="ag-name-sprint"> and so text inherits the h1 fontsize. This h1 header is missing in v6.3.
in v6.3 the font-size is inherited from the class:
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