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 +1614,15 @@
 .wp-block-post-author__avatar img {
   border-radius: 100%;
 }
+
+.wp-block-search__input,
+ input[type=search] {
+  padding: 0.38rem 0.66rem;
+  min-height: auto;
+  font-size: 22px;
+}
+.wp-block-search__button{
+  background: #0073aa;
+    border-radius: 5px;
+    color: #fff;
+}
\ No newline at end of file
Index: wp-content/themes/twentynineteen/style-editor.scss
===================================================================
--- wp-content/themes/twentynineteen/style-editor.scss	(revision 57139)
+++ wp-content/themes/twentynineteen/style-editor.scss	(working copy)
@@ -1031,3 +1031,23 @@
 .wp-block-post-author__avatar img {
 	border-radius: 100%;
 }
+
+.wp-block-search {
+	&__input {
+		padding: 0.38rem 0.66rem;
+		min-height: auto;
+		font-size: 22px;
+	}
+
+	input[type=search] {
+		padding: 0.38rem 0.66rem;
+		min-height: auto;
+		font-size: 22px;
+	}
+
+	&__button {
+		background: #0073aa;
+		border-radius: 5px;
+		color: #fff;
+	}
+}
\ No newline at end of file