diff -u b/core/themes/bartik/color/preview.css b/core/themes/bartik/color/preview.css
--- b/core/themes/bartik/color/preview.css
+++ b/core/themes/bartik/color/preview.css
@@ -21,7 +21,4 @@
   padding: 15px;
 }
-#preview-logo img {
-  width: 57px;
-}
 #preview-site-name {
   color: #686868;
diff -u b/core/themes/bartik/css/style.css b/core/themes/bartik/css/style.css
--- b/core/themes/bartik/css/style.css
+++ b/core/themes/bartik/css/style.css
@@ -355,7 +355,6 @@
 .site-logo {
   float: left; /* LTR */
   padding: 4px 4px 4px 9px; /* LTR */
-  width: 57px;
 }
 [dir="rtl"] #logo,
 [dir="rtl"] .site-logo {
diff -u b/core/themes/bartik/logo.svg b/core/themes/bartik/logo.svg
--- b/core/themes/bartik/logo.svg
+++ b/core/themes/bartik/logo.svg
@@ -1 +1 @@
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\ No newline at end of file
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