diff --git a/docs/reference-guides/core-blocks.md b/docs/reference-guides/core-blocks.md
index 8dc2d9c42fad5..ea015225d355b 100644
--- a/docs/reference-guides/core-blocks.md
+++ b/docs/reference-guides/core-blocks.md
@@ -725,7 +725,7 @@ Display a graphic to represent this site. Update the block, and the changes appl
 
 -	**Name:** core/site-logo
 -	**Category:** theme
--	**Supports:** align, color (~~background~~, ~~text~~), ~~alignWide~~, ~~html~~
+-	**Supports:** align, color (~~background~~, ~~text~~), spacing (margin, padding), ~~alignWide~~, ~~html~~
 -	**Attributes:** isLink, linkTarget, shouldSyncIcon, width
 
 ## Site Tagline
diff --git a/packages/block-library/src/site-logo/block.json b/packages/block-library/src/site-logo/block.json
index 1bd8897701ef9..f7efcb72159ff 100644
--- a/packages/block-library/src/site-logo/block.json
+++ b/packages/block-library/src/site-logo/block.json
@@ -37,6 +37,10 @@
 			"__experimentalDuotone": "img, .components-placeholder__illustration, .components-placeholder::before",
 			"text": false,
 			"background": false
+		},
+		"spacing": {
+			"margin": true,
+			"padding": true
 		}
 	},
 	"styles": [
diff --git a/packages/block-library/src/site-logo/style.scss b/packages/block-library/src/site-logo/style.scss
index cf7154bc2dd10..2fae735f369b5 100644
--- a/packages/block-library/src/site-logo/style.scss
+++ b/packages/block-library/src/site-logo/style.scss
@@ -1,4 +1,6 @@
 .wp-block-site-logo {
+	// This block has customizable padding, border-box makes that more predictable.
+	box-sizing: border-box;
 	line-height: 0;
 
 	a {