diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5438893..0a4e880 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ### Fixed
 
+- Fixes [#858](https://github.com/eamodio/vscode-gitlens/issues/858) - GitHub avatars in blame line hovers are huge
 - Fixes issue with locating a working file when the file is staged or modified
 
 ## [10.0.0]- 2019-09-20
diff --git a/src/git/formatters/commitFormatter.ts b/src/git/formatters/commitFormatter.ts
index b0e96dd..5c89659 100644
--- a/src/git/formatters/commitFormatter.ts
+++ b/src/git/formatters/commitFormatter.ts
@@ -129,7 +129,9 @@ export class CommitFormatter extends Formatter<GitCommit, CommitFormatOptions> {
 			return emptyStr;
 		}
 
-		let avatar = `![](${this._item.getGravatarUri(Container.config.defaultGravatarsStyle).toString(true)})`;
+		let avatar = `![](${this._item
+			.getGravatarUri(Container.config.defaultGravatarsStyle)
+			.toString(true)}|width=16,height=16)`;
 
 		const presence = this._options.presence;
 		if (presence != null) {