diff --git a/docs/reference-guides/core-blocks.md b/docs/reference-guides/core-blocks.md
index 165cdff2902e91..fef0bc93de3c0f 100644
--- a/docs/reference-guides/core-blocks.md
+++ b/docs/reference-guides/core-blocks.md
@@ -572,7 +572,7 @@ Post terms. ([Source](https://github.com/WordPress/gutenberg/tree/trunk/packages
 
 -	**Name:** core/post-terms
 -	**Category:** theme
--	**Supports:** color (background, gradients, link, text), typography (fontSize, lineHeight), ~~html~~
+-	**Supports:** color (background, gradients, link, text), spacing (margin, padding), typography (fontSize, lineHeight), ~~html~~
 -	**Attributes:** prefix, separator, suffix, term, textAlign
 
 ## Post Title
diff --git a/packages/block-library/src/post-terms/block.json b/packages/block-library/src/post-terms/block.json
index 26f3915d5b0e04..e14f96170ca88c 100644
--- a/packages/block-library/src/post-terms/block.json
+++ b/packages/block-library/src/post-terms/block.json
@@ -38,6 +38,10 @@
 				"link": true
 			}
 		},
+		"spacing": {
+			"margin": true,
+			"padding": true
+		},
 		"typography": {
 			"fontSize": true,
 			"lineHeight": true,
diff --git a/packages/block-library/src/post-terms/style.scss b/packages/block-library/src/post-terms/style.scss
index e447f1fd6b60d6..c40d60e94fe569 100644
--- a/packages/block-library/src/post-terms/style.scss
+++ b/packages/block-library/src/post-terms/style.scss
@@ -1,3 +1,8 @@
-.wp-block-post-terms__separator {
-	white-space: pre-wrap;
+.wp-block-post-terms {
+	// This block has customizable padding, border-box makes that more predictable.
+	box-sizing: border-box;
+
+	.wp-block-post-terms__separator {
+		white-space: pre-wrap;
+	}
 }