diff --git a/packages/block-editor/src/components/block-list/style.scss b/packages/block-editor/src/components/block-list/style.scss
index ca821660c6edba..82d2eafc11121d 100644
--- a/packages/block-editor/src/components/block-list/style.scss
+++ b/packages/block-editor/src/components/block-list/style.scss
@@ -600,7 +600,7 @@
 			&:focus::before {
 				left: 0 !important;
 				min-width: 0;
-				width: calc(100% + #{ $border-width });
+				width: 100%;
 			}
 		}
 	}
diff --git a/packages/block-editor/src/components/block-mover/style.scss b/packages/block-editor/src/components/block-mover/style.scss
index 2635dfdc8f3748..65670ff655292e 100644
--- a/packages/block-editor/src/components/block-mover/style.scss
+++ b/packages/block-editor/src/components/block-mover/style.scss
@@ -47,7 +47,7 @@
 		// Focus style.
 		&::before {
 			bottom: 0;
-			height: 100%;
+			height: calc(100% - #{ $border-width });
 		}
 	}
 
@@ -60,7 +60,7 @@
 		// Focus style.
 		&::before {
 			top: 0;
-			height: 100%;
+			height: calc(100% - #{ $border-width });
 		}
 	}