diff --git a/assets/javascripts/discourse/templates/components/wizard-custom-field.hbs b/assets/javascripts/discourse/templates/components/wizard-custom-field.hbs
index c669692a..3b63cef7 100644
--- a/assets/javascripts/discourse/templates/components/wizard-custom-field.hbs
+++ b/assets/javascripts/discourse/templates/components/wizard-custom-field.hbs
@@ -120,6 +120,7 @@
     <div class="setting-value">
       {{textarea
         name="field_placeholder"
+        class="medium"
         value=field.placeholder}}
     </div>
   </div>
diff --git a/assets/stylesheets/common/wizard-admin.scss b/assets/stylesheets/common/wizard-admin.scss
index 2d6c9a6a..66cc6b43 100644
--- a/assets/stylesheets/common/wizard-admin.scss
+++ b/assets/stylesheets/common/wizard-admin.scss
@@ -256,6 +256,10 @@
         width: 100%;
         box-sizing: border-box;
         margin-bottom: 0;
+
+        &.medium {
+          width: 40%;
+        }
       }
 
       input[type="number"] {