The editor icon is much larger than on other pages, for instance:
https://musicbrainz.org/user/aerozol
vs
https://musicbrainz.org/release/cf19803d-0dfa-44f4-8fce-0674c98471b1

This line in the artist page:
<img alt="" class="avatar no-avatar" height="54" src="https://staticbrainz.org/MB/editor-b055e61.svg" width="54">
Can be changed to height + width = 31

(if someone can help me find where, I can change this... various searches in github didn't find it!)