Index: wp-content/themes/twentynineteen/sass/blocks/_blocks.scss
===================================================================
--- wp-content/themes/twentynineteen/sass/blocks/_blocks.scss	(revision 57139)
+++ wp-content/themes/twentynineteen/sass/blocks/_blocks.scss	(working copy)
@@ -898,7 +898,12 @@
 				}
 			}
 		}
-		
+		.wp-block-pullquote{
+			font-size: inherit;
+			p{
+				font-size: inherit;
+			}
+		}
 	}
 
 	//! Latest Comments
Index: wp-content/themes/twentynineteen/style-editor.css
===================================================================
--- wp-content/themes/twentynineteen/style-editor.css	(revision 57139)
+++ wp-content/themes/twentynineteen/style-editor.css	(working copy)
@@ -1614,3 +1614,12 @@
 .wp-block-post-author__avatar img {
   border-radius: 100%;
 }
+
+.wp-block-group{
+  .wp-block-pullquote{
+    font-size: inherit;
+    p{
+      font-size: inherit;
+    }
+  }
+}
\ No newline at end of file