diff --git a/src/main/java/org/jabref/gui/Base.css b/src/main/java/org/jabref/gui/Base.css
index eacdf4815ac..474f387b952 100644
--- a/src/main/java/org/jabref/gui/Base.css
+++ b/src/main/java/org/jabref/gui/Base.css
@@ -1224,3 +1224,7 @@ TextFlow * {
 .mainTable-header {
     -fx-fill: -fx-mid-text-color;
 }
+
+.prefSpinner{
+    -fx-pref-width: 5em;
+}
diff --git a/src/main/java/org/jabref/gui/preferences/AppearanceTab.fxml b/src/main/java/org/jabref/gui/preferences/AppearanceTab.fxml
index e2f57285195..d0b2f96ddc5 100644
--- a/src/main/java/org/jabref/gui/preferences/AppearanceTab.fxml
+++ b/src/main/java/org/jabref/gui/preferences/AppearanceTab.fxml
@@ -25,7 +25,7 @@
     <CheckBox fx:id="fontOverride" text="%Override default font settings"/>
     <HBox alignment="CENTER_LEFT" spacing="4.0">
         <Label text="%Size" disable="${!fontOverride.selected}"/>
-        <Spinner fx:id="fontSize" prefWidth="60.0" editable="true"/>
+        <Spinner fx:id="fontSize" styleClass="prefSpinner" editable="true"/>
         <padding>
             <Insets left="20.0"/>
         </padding>