diff --git a/scss/_breadcrumb.scss b/scss/_breadcrumb.scss
index ea2036c45f..d748894f96 100644
--- a/scss/_breadcrumb.scss
+++ b/scss/_breadcrumb.scss
@@ -3,6 +3,7 @@
   flex-wrap: wrap;
   padding: $breadcrumb-padding-y $breadcrumb-padding-x;
   margin-bottom: $breadcrumb-margin-bottom;
+  @include font-size($breadcrumb-font-size);
   list-style: none;
   background-color: $breadcrumb-bg;
   @include border-radius($breadcrumb-border-radius);
diff --git a/scss/_variables.scss b/scss/_variables.scss
index 6850b23b59..be3a0f7985 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -1050,6 +1050,8 @@ $figure-caption-color:              $gray-600 !default;
 
 // Breadcrumbs
 
+$breadcrumb-font-size:              null !default;
+
 $breadcrumb-padding-y:              .75rem !default;
 $breadcrumb-padding-x:              1rem !default;
 $breadcrumb-item-padding:           .5rem !default;