diff --git a/scss/_images.scss b/scss/_images.scss
index 410a09e364..d17006df24 100644
--- a/scss/_images.scss
+++ b/scss/_images.scss
@@ -47,6 +47,6 @@
 }
 
 .figure-caption {
-  font-size: 90%;
+  font-size: $figure-caption-font-size;
   color: $gray-light;
 }
diff --git a/scss/_variables.scss b/scss/_variables.scss
index c02af45f55..78719df068 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -737,6 +737,11 @@ $thumbnail-border-radius:     $border-radius !default;
 $thumbnail-box-shadow:        0 1px 2px rgba(0,0,0,.075) !default;
 
 
+// Figures
+
+$figure-caption-font-size: 90% !default;
+
+
 // Breadcrumbs
 
 $breadcrumb-padding-y:          .75rem !default;