diff --git a/site/content/docs/4.3/examples/checkout/form-validation.css b/site/content/docs/4.3/examples/checkout/form-validation.css
index 7a6246faec..e5ea31c405 100644
--- a/site/content/docs/4.3/examples/checkout/form-validation.css
+++ b/site/content/docs/4.3/examples/checkout/form-validation.css
@@ -1,5 +1,3 @@
 .container {
   max-width: 960px;
 }
-
-.lh-condensed { line-height: 1.25; }
diff --git a/site/content/docs/4.3/examples/checkout/index.html b/site/content/docs/4.3/examples/checkout/index.html
index e7865ff6ed..e0bec33018 100644
--- a/site/content/docs/4.3/examples/checkout/index.html
+++ b/site/content/docs/4.3/examples/checkout/index.html
@@ -22,21 +22,21 @@ body_class: "bg-light"
         <span class="badge bg-secondary rounded-pill">3</span>
       </h4>
       <ul class="list-group mb-3">
-        <li class="list-group-item d-flex justify-content-between lh-condensed">
+        <li class="list-group-item d-flex justify-content-between lh-sm">
           <div>
             <h6 class="my-0">Product name</h6>
             <small class="text-muted">Brief description</small>
           </div>
           <span class="text-muted">$12</span>
         </li>
-        <li class="list-group-item d-flex justify-content-between lh-condensed">
+        <li class="list-group-item d-flex justify-content-between lh-sm">
           <div>
             <h6 class="my-0">Second product</h6>
             <small class="text-muted">Brief description</small>
           </div>
           <span class="text-muted">$8</span>
         </li>
-        <li class="list-group-item d-flex justify-content-between lh-condensed">
+        <li class="list-group-item d-flex justify-content-between lh-sm">
           <div>
             <h6 class="my-0">Third item</h6>
             <small class="text-muted">Brief description</small>
@@ -92,7 +92,7 @@ body_class: "bg-light"
               <span class="input-group-text">@</span>
             </div>
             <input type="text" class="form-control" id="username" placeholder="Username" required>
-            <div class="invalid-feedback" style="width: 100%;">
+            <div class="invalid-feedback w-100">
               Your username is required.
             </div>
           </div>
diff --git a/site/content/docs/4.3/examples/floating-labels/floating-labels.css b/site/content/docs/4.3/examples/floating-labels/floating-labels.css
index 295a7e695e..d6398b2576 100644
--- a/site/content/docs/4.3/examples/floating-labels/floating-labels.css
+++ b/site/content/docs/4.3/examples/floating-labels/floating-labels.css
@@ -36,7 +36,6 @@ body {
   display: block;
   width: 100%;
   margin-bottom: 0; /* Override default `<label>` margin */
-  line-height: 1.5;
   color: #495057;
   pointer-events: none;
   cursor: text; /* Match the input under the label */
diff --git a/site/content/docs/4.3/examples/offcanvas/index.html b/site/content/docs/4.3/examples/offcanvas/index.html
index 308a95f1ac..e6f734a4d6 100644
--- a/site/content/docs/4.3/examples/offcanvas/index.html
+++ b/site/content/docs/4.3/examples/offcanvas/index.html
@@ -64,8 +64,8 @@ body_class: "bg-light"
 <main role="main" class="container">
   <div class="d-flex align-items-center p-3 my-3 text-white-50 bg-purple rounded shadow-sm">
     <img class="mr-3" src="/docs/{{< param docs_version >}}/assets/brand/bootstrap-outline.svg" alt="" width="48" height="48">
-    <div class="lh-100">
-      <h6 class="mb-0 text-white lh-100">Bootstrap</h6>
+    <div class="lh-1">
+      <h6 class="mb-0 text-white lh-1">Bootstrap</h6>
       <small>Since 2011</small>
     </div>
   </div>
@@ -74,21 +74,21 @@ body_class: "bg-light"
     <h6 class="border-bottom border-gray pb-2 mb-0">Recent updates</h6>
     <div class="media text-muted pt-3">
       {{< placeholder width="32" height="32" background="#007bff" color="#007bff" class="mr-2 rounded" >}}
-      <p class="media-body pb-3 mb-0 small lh-125 border-bottom border-gray">
+      <p class="media-body pb-3 mb-0 small lh-sm border-bottom border-gray">
         <strong class="d-block text-gray-dark">@username</strong>
         Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.
       </p>
     </div>
     <div class="media text-muted pt-3">
       {{< placeholder width="32" height="32" background="#e83e8c" color="#e83e8c" class="mr-2 rounded" >}}
-      <p class="media-body pb-3 mb-0 small lh-125 border-bottom border-gray">
+      <p class="media-body pb-3 mb-0 small lh-sm border-bottom border-gray">
         <strong class="d-block text-gray-dark">@username</strong>
         Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.
       </p>
     </div>
     <div class="media text-muted pt-3">
       {{< placeholder width="32" height="32" background="#6f42c1" color="#6f42c1" class="mr-2 rounded" >}}
-      <p class="media-body pb-3 mb-0 small lh-125 border-bottom border-gray">
+      <p class="media-body pb-3 mb-0 small lh-sm border-bottom border-gray">
         <strong class="d-block text-gray-dark">@username</strong>
         Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.
       </p>
@@ -102,7 +102,7 @@ body_class: "bg-light"
     <h6 class="border-bottom border-gray pb-2 mb-0">Suggestions</h6>
     <div class="media text-muted pt-3">
       {{< placeholder width="32" height="32" background="#007bff" color="#007bff" class="mr-2 rounded" >}}
-      <div class="media-body pb-3 mb-0 small lh-125 border-bottom border-gray">
+      <div class="media-body pb-3 mb-0 small lh-sm border-bottom border-gray">
         <div class="d-flex justify-content-between align-items-center w-100">
           <strong class="text-gray-dark">Full Name</strong>
           <a href="#">Follow</a>
@@ -112,7 +112,7 @@ body_class: "bg-light"
     </div>
     <div class="media text-muted pt-3">
       {{< placeholder width="32" height="32" background="#007bff" color="#007bff" class="mr-2 rounded" >}}
-      <div class="media-body pb-3 mb-0 small lh-125 border-bottom border-gray">
+      <div class="media-body pb-3 mb-0 small lh-sm border-bottom border-gray">
         <div class="d-flex justify-content-between align-items-center w-100">
           <strong class="text-gray-dark">Full Name</strong>
           <a href="#">Follow</a>
@@ -122,7 +122,7 @@ body_class: "bg-light"
     </div>
     <div class="media text-muted pt-3">
       {{< placeholder width="32" height="32" background="#007bff" color="#007bff" class="mr-2 rounded" >}}
-      <div class="media-body pb-3 mb-0 small lh-125 border-bottom border-gray">
+      <div class="media-body pb-3 mb-0 small lh-sm border-bottom border-gray">
         <div class="d-flex justify-content-between align-items-center w-100">
           <strong class="text-gray-dark">Full Name</strong>
           <a href="#">Follow</a>
diff --git a/site/content/docs/4.3/examples/offcanvas/offcanvas.css b/site/content/docs/4.3/examples/offcanvas/offcanvas.css
index 934c96e7a3..29e26b11bd 100644
--- a/site/content/docs/4.3/examples/offcanvas/offcanvas.css
+++ b/site/content/docs/4.3/examples/offcanvas/offcanvas.css
@@ -65,7 +65,3 @@ body {
 .text-white-50 { color: rgba(255, 255, 255, .5); }
 
 .bg-purple { background-color: #6f42c1; }
-
-.lh-100 { line-height: 1; }
-.lh-125 { line-height: 1.25; }
-.lh-150 { line-height: 1.5; }