Board Thread:Support Requests - Designing Your Wiki/@comment-44745594-20200531065955/@comment-3026053-20200531224228

The wordmark displayed on The Rising of the Shield Hero Wiki is a svg image that is laid over the regular wordmark with css.

The second difference of why their wordmark looks bigger is because they've utilized all the available space in the 250x65 box, whereas you left quite some space on either side of the wordmark.