diff --git a/theme/boost/scss/moodle/blocks.scss b/theme/boost/scss/moodle/blocks.scss
index 7151c72912d..b52a1fb4eaa 100644
--- a/theme/boost/scss/moodle/blocks.scss
+++ b/theme/boost/scss/moodle/blocks.scss
@@ -123,8 +123,8 @@ $card-gutter : $card-deck-margin * 2;
 }
 
 .summaryimage {
-    height: 7rem;
-    width: 7rem;
+    height: 5rem;
+    width: 5rem;
     background-position: center;
     background-size: cover;
 }
diff --git a/theme/boost/style/moodle.css b/theme/boost/style/moodle.css
index d63018cdbbd..9b23798b429 100644
--- a/theme/boost/style/moodle.css
+++ b/theme/boost/style/moodle.css
@@ -11256,8 +11256,8 @@ div.editor_atto_toolbar button .icon {
   overflow-x: scroll; }
 
 .summaryimage {
-  height: 7rem;
-  width: 7rem;
+  height: 5rem;
+  width: 5rem;
   background-position: center;
   background-size: cover; }
 
diff --git a/theme/bootstrapbase/less/moodle/blocks.less b/theme/bootstrapbase/less/moodle/blocks.less
index a942d215898..b355cc0d123 100644
--- a/theme/bootstrapbase/less/moodle/blocks.less
+++ b/theme/bootstrapbase/less/moodle/blocks.less
@@ -455,8 +455,8 @@ body.used-region-side-pre.used-region-side-post {
 }
 
 .summaryimage {
-    height: 7rem;
-    width: 7rem;
+    height: 5rem;
+    width: 5rem;
     .border-radius(50%);
     background-position: center;
     background-size: cover;
diff --git a/theme/bootstrapbase/style/moodle.css b/theme/bootstrapbase/style/moodle.css
index 84cab09050e..ba8e5867a6a 100644
--- a/theme/bootstrapbase/style/moodle.css
+++ b/theme/bootstrapbase/style/moodle.css
@@ -16530,8 +16530,8 @@ body {
   border-top-left-radius: 4px;
 }
 .summaryimage {
-  height: 7rem;
-  width: 7rem;
+  height: 5rem;
+  width: 5rem;
   -webkit-border-radius: 50%;
   -moz-border-radius: 50%;
   border-radius: 50%;