diff --git a/scss/_card.scss b/scss/_card.scss
index fdbe95f404..c23568f37b 100644
--- a/scss/_card.scss
+++ b/scss/_card.scss
@@ -7,6 +7,7 @@
   display: flex;
   flex-direction: column;
   min-width: 0; // See https://github.com/twbs/bootstrap/pull/22740#issuecomment-305868106
+  height: $card-height;
   word-wrap: break-word;
   background-color: $card-bg;
   background-clip: border-box;
diff --git a/scss/_variables.scss b/scss/_variables.scss
index 3a1917ada4..6850b23b59 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -834,6 +834,7 @@ $card-border-color:                 rgba($black, .125) !default;
 $card-inner-border-radius:          calc(#{$card-border-radius} - #{$card-border-width}) !default;
 $card-cap-bg:                       rgba($black, .03) !default;
 $card-cap-color:                    null !default;
+$card-height:                       null !default;
 $card-color:                        null !default;
 $card-bg:                           $white !default;
 
diff --git a/site/docs/4.3/components/card.md b/site/docs/4.3/components/card.md
index 14a6302c14..cb1301b82b 100644
--- a/site/docs/4.3/components/card.md
+++ b/site/docs/4.3/components/card.md
@@ -711,7 +711,7 @@ Change it to `.row-cols-3` and you'll see the fourth card wrap.
 {% endcapture %}
 {% include example.html content=example %}
 
-When you need equal height, add `.h-100` to the cards.
+When you need equal height, add `.h-100` to the cards. If you want equal heights by default, you can set `$card-height: 100%` in Sass.
 
 {% capture example %}
 <div class="row row-cols-1 row-cols-md-3">