diff --git a/scss/_buttons.scss b/scss/_buttons.scss
index caa4518ac8..9b0a07d5fa 100644
--- a/scss/_buttons.scss
+++ b/scss/_buttons.scss
@@ -208,9 +208,9 @@
 //
 
 .btn-lg {
-  @include button-size($btn-padding-y-lg, $btn-padding-x-lg, $btn-font-size-lg, $btn-border-radius-lg);
+  @include button-size($btn-padding-y-lg, $btn-padding-x-lg, $btn-font-size-lg, $btn-border-radius-lg, $btn-line-height-lg);
 }
 
 .btn-sm {
-  @include button-size($btn-padding-y-sm, $btn-padding-x-sm, $btn-font-size-sm, $btn-border-radius-sm);
+  @include button-size($btn-padding-y-sm, $btn-padding-x-sm, $btn-font-size-sm, $btn-border-radius-sm, $btn-line-height-sm);
 }
diff --git a/scss/_variables.scss b/scss/_variables.scss
index 1ffa7e74bf..72f0651469 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -801,10 +801,12 @@ $input-btn-focus-box-shadow:    $focus-ring-box-shadow !default;
 $input-btn-padding-y-sm:      .25rem !default;
 $input-btn-padding-x-sm:      .5rem !default;
 $input-btn-font-size-sm:      $font-size-sm !default;
+$input-btn-line-height-sm:    $line-height-sm !default;
 
 $input-btn-padding-y-lg:      .5rem !default;
 $input-btn-padding-x-lg:      1rem !default;
 $input-btn-font-size-lg:      $font-size-lg !default;
+$input-btn-line-height-lg:    $line-height-lg !default;
 
 $input-btn-border-width:      var(--#{$prefix}border-width) !default;
 // scss-docs-end input-btn-variables
@@ -826,10 +828,12 @@ $btn-white-space:             null !default; // Set to `nowrap` to prevent text
 $btn-padding-y-sm:            $input-btn-padding-y-sm !default;
 $btn-padding-x-sm:            $input-btn-padding-x-sm !default;
 $btn-font-size-sm:            $input-btn-font-size-sm !default;
+$btn-line-height-sm:          $input-btn-line-height-sm !default;
 
 $btn-padding-y-lg:            $input-btn-padding-y-lg !default;
 $btn-padding-x-lg:            $input-btn-padding-x-lg !default;
 $btn-font-size-lg:            $input-btn-font-size-lg !default;
+$btn-line-height-lg:          $input-btn-line-height-lg !default;
 
 $btn-border-width:            $input-btn-border-width !default;
 
diff --git a/scss/mixins/_buttons.scss b/scss/mixins/_buttons.scss
index cf087fda78..c0b9f42729 100644
--- a/scss/mixins/_buttons.scss
+++ b/scss/mixins/_buttons.scss
@@ -61,10 +61,11 @@
 // scss-docs-end btn-outline-variant-mixin
 
 // scss-docs-start btn-size-mixin
-@mixin button-size($padding-y, $padding-x, $font-size, $border-radius) {
+@mixin button-size($padding-y, $padding-x, $font-size, $border-radius, $line-height) {
   --#{$prefix}btn-padding-y: #{$padding-y};
   --#{$prefix}btn-padding-x: #{$padding-x};
   @include rfs($font-size, --#{$prefix}btn-font-size);
+  --#{$prefix}btn-line-height: #{$line-height};
   --#{$prefix}btn-border-radius: #{$border-radius};
 }
 // scss-docs-end btn-size-mixin