diff --git a/plugins/woocommerce/changelog/add-missing-wp-block-classnames-49739 b/plugins/woocommerce/changelog/add-missing-wp-block-classnames-49739
new file mode 100644
index 00000000000..dc4c7059a56
--- /dev/null
+++ b/plugins/woocommerce/changelog/add-missing-wp-block-classnames-49739
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fix
+
+Added missing wp-block- classes to order confirmation, store notices, and breadcrumb blocks.
diff --git a/plugins/woocommerce/src/Blocks/BlockTypes/Breadcrumbs.php b/plugins/woocommerce/src/Blocks/BlockTypes/Breadcrumbs.php
index dc25d2258bd..fb0e0b1cc0e 100644
--- a/plugins/woocommerce/src/Blocks/BlockTypes/Breadcrumbs.php
+++ b/plugins/woocommerce/src/Blocks/BlockTypes/Breadcrumbs.php
@@ -34,14 +34,16 @@ class Breadcrumbs extends AbstractBlock {
 			return;
 		}
 
-		$classname          = $attributes['className'] ?? '';
 		$classes_and_styles = StyleAttributesUtils::get_classes_and_styles_by_attributes( $attributes );
 
 		return sprintf(
-			'<div class="woocommerce wc-block-breadcrumbs %1$s %2$s" style="%3$s">%4$s</div>',
-			esc_attr( $classes_and_styles['classes'] ),
-			esc_attr( $classname ),
-			esc_attr( $classes_and_styles['styles'] ),
+			'<div %1$s>%2$s</div>',
+			get_block_wrapper_attributes(
+				array(
+					'class' => 'wc-block-breadcrumbs woocommerce ' . esc_attr( $classes_and_styles['classes'] ),
+					'style' => $classes_and_styles['styles'],
+				)
+			),
 			$breadcrumb
 		);
 	}
diff --git a/plugins/woocommerce/src/Blocks/BlockTypes/OrderConfirmation/AbstractOrderConfirmationBlock.php b/plugins/woocommerce/src/Blocks/BlockTypes/OrderConfirmation/AbstractOrderConfirmationBlock.php
index 4887dd04e30..66b263dbe82 100644
--- a/plugins/woocommerce/src/Blocks/BlockTypes/OrderConfirmation/AbstractOrderConfirmationBlock.php
+++ b/plugins/woocommerce/src/Blocks/BlockTypes/OrderConfirmation/AbstractOrderConfirmationBlock.php
@@ -55,11 +55,12 @@ abstract class AbstractOrderConfirmationBlock extends AbstractBlock {
 		}
 
 		return $block_content ? sprintf(
-			'<div class="wc-block-%4$s %1$s" style="%2$s">%3$s</div>',
+			'<div class="wp-block-%5$s-%4$s wc-block-%4$s %1$s" style="%2$s">%3$s</div>',
 			esc_attr( trim( $classname ) ),
 			esc_attr( $classes_and_styles['styles'] ),
 			$block_content,
-			esc_attr( $this->block_name )
+			esc_attr( $this->block_name ),
+			esc_attr( $this->namespace )
 		) : '';
 	}
 
diff --git a/plugins/woocommerce/src/Blocks/BlockTypes/StoreNotices.php b/plugins/woocommerce/src/Blocks/BlockTypes/StoreNotices.php
index c9c20d21548..9addff1a630 100644
--- a/plugins/woocommerce/src/Blocks/BlockTypes/StoreNotices.php
+++ b/plugins/woocommerce/src/Blocks/BlockTypes/StoreNotices.php
@@ -45,17 +45,15 @@ class StoreNotices extends AbstractBlock {
 			return;
 		}
 
-		$classname          = isset( $attributes['className'] ) ? $attributes['className'] : '';
 		$classes_and_styles = StyleAttributesUtils::get_classes_and_styles_by_attributes( $attributes );
 
-		if ( isset( $attributes['align'] ) ) {
-			$classname .= " align{$attributes['align']}";
-		}
-
 		return sprintf(
-			'<div class="woocommerce wc-block-store-notices %1$s %2$s">%3$s</div>',
-			esc_attr( $classes_and_styles['classes'] ),
-			esc_attr( $classname ),
+			'<div %1$s>%2$s</div>',
+			get_block_wrapper_attributes(
+				array(
+					'class' => 'wc-block-store-notices woocommerce ' . esc_attr( $classes_and_styles['classes'] ),
+				)
+			),
 			wc_kses_notice( $notices )
 		);
 	}