diff --git a/src/wp-admin/css/themes.css b/src/wp-admin/css/themes.css
index bd116288723dc..4a644974c50c4 100644
--- a/src/wp-admin/css/themes.css
+++ b/src/wp-admin/css/themes.css
@@ -1967,7 +1967,7 @@ body.full-overlay-active {
 
 .theme-install-overlay .wp-full-overlay-header .button {
 	float: right;
-	margin: 3px 10px 0 0; /* Vertically center 40px button in 45px header */
+	margin: 7px 10px 0 0; /* Vertically center 32px button in 45px header */
 }
 
 .theme-install-overlay .wp-full-overlay-sidebar {
@@ -2053,8 +2053,6 @@ body.full-overlay-active {
 
 	.theme-install-overlay .wp-full-overlay-header .button {
 		font-size: 13px;
-		line-height: 2.15384615;
-		min-height: 30px;
 	}
 
 	.theme-browser .theme .theme-actions .button {
diff --git a/src/wp-admin/theme-install.php b/src/wp-admin/theme-install.php
index e9d217c0f7525..861eb87050814 100644
--- a/src/wp-admin/theme-install.php
+++ b/src/wp-admin/theme-install.php
@@ -487,18 +487,18 @@
 					$aria_label = sprintf( _x( 'Activate %s', 'theme' ), '{{ data.name }}' );
 					?>
 					<# if ( ! data.active ) { #>
-						<a class="button button-primary activate" href="{{ data.activate_url }}" aria-label="<?php echo esc_attr( $aria_label ); ?>"><?php _e( 'Activate' ); ?></a>
+						<a class="button button-primary button-compact activate" href="{{ data.activate_url }}" aria-label="<?php echo esc_attr( $aria_label ); ?>"><?php _e( 'Activate' ); ?></a>
 					<# } else { #>
-						<button class="button button-primary disabled"><?php _ex( 'Activated', 'theme' ); ?></button>
+						<button class="button button-primary button-compact disabled"><?php _ex( 'Activated', 'theme' ); ?></button>
 					<# } #>
 				<# } else { #>
-					<a class="button button-primary disabled" ><?php _ex( 'Cannot Activate', 'theme' ); ?></a>
+					<a class="button button-primary button-compact disabled" ><?php _ex( 'Cannot Activate', 'theme' ); ?></a>
 				<# } #>
 			<# } else { #>
 				<# if ( data.compatible_wp && data.compatible_php ) { #>
-					<a href="{{ data.install_url }}" class="button button-primary theme-install" data-name="{{ data.name }}" data-slug="{{ data.id }}"><?php _e( 'Install' ); ?></a>
+					<a href="{{ data.install_url }}" class="button button-primary button-compact theme-install" data-name="{{ data.name }}" data-slug="{{ data.id }}"><?php _e( 'Install' ); ?></a>
 				<# } else { #>
-					<a class="button button-primary disabled" ><?php _ex( 'Cannot Install', 'theme' ); ?></a>
+					<a class="button button-primary button-compact disabled" ><?php _ex( 'Cannot Install', 'theme' ); ?></a>
 				<# } #>
 			<# } #>
 		</div>