diff --git a/src/rendering/Box/index.js b/src/rendering/Box/index.js
new file mode 100644
index 0000000..9fc4498
--- /dev/null
+++ b/src/rendering/Box/index.js
@@ -0,0 +1,85 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+
+import { getBBox } from 'layout';
+
+import * as style from './style';
+
+const Box = ({
+  theme,
+  radius,
+  label,
+  width,
+  height,
+  rectTransform,
+  labelTransform,
+  contentTransform,
+  children
+}) => {
+  const rectProps = {
+    style: style[theme],
+    width,
+    height,
+    rx: radius,
+    ry: radius,
+    transform: rectTransform
+  };
+  const textProps = {
+    transform: labelTransform,
+    style: style.infoText
+  };
+
+  return <>
+    <rect { ...rectProps }></rect>
+    { label && <text { ...textProps }>{ label }</text> }
+    <g transform={ contentTransform}>
+      { children }
+    </g>
+  </>;
+};
+
+Box.defaultProps = {
+  padding: 5,
+  radius: 3
+};
+
+Box.propTypes = {
+  theme: PropTypes.string,
+  radius: PropTypes.number,
+  padding: PropTypes.number,
+  label: PropTypes.string,
+  width: PropTypes.number,
+  height: PropTypes.number,
+  rectTransform: PropTypes.string,
+  labelTransform: PropTypes.string,
+  contentTransform: PropTypes.string,
+  children: PropTypes.node
+};
+
+const layout = data => {
+  const { label, padding } = {
+    ...Box.defaultProps,
+    ...data.props
+  };
+  const childBox = data.children[0].box;
+  const labelBox = label ?
+    getBBox(<text style={ style.infoText }>{ label }</text>) :
+    { width: 0, height: 0 };
+
+  data.box = {
+    width: Math.max(childBox.width + 2 * padding, labelBox.width),
+    height: childBox.height + 2 * padding + labelBox.height
+  };
+  data.props = {
+    ...data.props,
+    width: data.box.width,
+    height: childBox.height + 2 * padding,
+    rectTransform: `translate(0 ${ labelBox.height })`,
+    labelTransform: `translate(0 ${ labelBox.height })`,
+    contentTransform: `translate(${ padding } ${ padding + labelBox.height })`
+  };
+  return data;
+};
+
+export default Box;
+export { layout };
diff --git a/src/rendering/Box/style.js b/src/rendering/Box/style.js
new file mode 100644
index 0000000..ada161b
--- /dev/null
+++ b/src/rendering/Box/style.js
@@ -0,0 +1,38 @@
+import {
+  green,
+  brown,
+  tan,
+  grey,
+  blue,
+  fontFamily,
+  fontSizeSmall,
+  strokeBase
+} from 'rendering/style';
+
+export const literal = {
+  fill: blue,
+  strokeWidth: '1px',
+  stroke: brown
+};
+export const escape = {
+  fill: green,
+  strokeWidth: '1px',
+  stroke: brown
+};
+export const charClass = {
+  fill: tan
+};
+export const capture = {
+  fillOpacity: 0,
+  ...strokeBase,
+  stroke: grey,
+  strokeDasharray: '6,2'
+};
+export const anchor = {
+  fill: brown
+};
+export const infoText = {
+  fontSize: fontSizeSmall,
+  fontFamily: fontFamily,
+  dominantBaseline: 'text-after-edge'
+};
diff --git a/src/rendering/types.js b/src/rendering/types.js
index 88beaeb..da7e963 100644
--- a/src/rendering/types.js
+++ b/src/rendering/types.js
@@ -1,7 +1,9 @@
 import * as SVG from 'rendering/SVG';
 import * as Text from 'rendering/Text';
+import * as Box from 'rendering/Box';
 
 export default {
   SVG,
-  Text
+  Text,
+  Box
 };
diff --git a/src/syntax/js.js b/src/syntax/js.js
index a3c68bd..02e0478 100644
--- a/src/syntax/js.js
+++ b/src/syntax/js.js
@@ -6,12 +6,20 @@ const parse = expr => {
     type: 'SVG',
     children: [
       {
-        type: 'Text',
+        type: 'Box',
         props: {
-          quoted: true
+          theme: 'literal'
         },
         children: [
-          `JS => ${ expr }`
+          {
+            type: 'Text',
+            props: {
+              quoted: true
+            },
+            children: [
+              `JS => ${ expr }`
+            ]
+          }
         ]
       }
     ]
diff --git a/src/syntax/pcre.js b/src/syntax/pcre.js
index 997046a..12b2fa4 100644
--- a/src/syntax/pcre.js
+++ b/src/syntax/pcre.js
@@ -6,12 +6,20 @@ const parse = expr => {
     type: 'SVG',
     children: [
       {
-        type: 'Text',
+        type: 'Box',
         props: {
-          quoted: true
+          theme: 'literal'
         },
         children: [
-          `PCRE => ${ expr }`
+          {
+            type: 'Text',
+            props: {
+              quoted: true
+            },
+            children: [
+              `PCRE => ${ expr }`
+            ]
+          }
         ]
       }
     ]