diff --git a/lib/all-badge-examples.js b/lib/all-badge-examples.js
index 0459ad76b7452..cd5eda48c1e63 100644
--- a/lib/all-badge-examples.js
+++ b/lib/all-badge-examples.js
@@ -781,6 +781,20 @@ const allBadgeExamples = [
           'node'
         ]
       },
+      {
+        title: 'npm bundle size (minified)',
+        previewUri: '/bundlephobia/min/react.svg',
+        keywords: [
+          'node'
+        ]
+      },
+      {
+        title: 'npm bundle size (minified + gzip)',
+        previewUri: '/bundlephobia/minzip/react.svg',
+        keywords: [
+          'node'
+        ]
+      },
       {
         title: 'node',
         previewUri: '/node/v/passport.svg',
diff --git a/server.js b/server.js
index ae6d2429aad1e..a99a393d8edc9 100644
--- a/server.js
+++ b/server.js
@@ -7613,6 +7613,61 @@ camp.route(/^\/nsp\/npm\/(?:@([^/]+)?\/)?([^/]+)?(?:\/([^/]+)?)?\.(svg|png|gif|j
   }
 }));
 
+// bundle size for npm packages
+camp.route(/^\/bundlephobia\/(min|minzip)\/(?:@([^/]+)?\/)?([^/]+)?(?:\/([^/]+)?)?\.(svg|png|gif|jpg|json)?$/,
+  cache((data, match, sendBadge, request) => {
+  // A: /bundlephobia/(min|minzip)/:package.:format
+  // B: /bundlephobia/(min|minzip)/:package/:version.:format
+  // C: /bundlephobia/(min|minzip)/@:scope/:package.:format
+  // D: /bundlephobia/(min|minzip)/@:scope/:package/:version.:format
+  const resultType = match[1];
+  const scope = match[2];
+  const packageName = match[3];
+  const packageVersion = match[4];
+  const format = match[5];
+  const showMin = resultType === 'min';
+
+  const badgeData = getBadgeData(showMin ? 'minified size' : 'minzipped size', data);
+
+  let packageString = typeof scope === 'string' ?
+    `@${scope}/${packageName}` : packageName;
+
+  if(packageVersion) {
+    packageString += `@${packageVersion}`;
+  }
+
+  const requestOptions = {
+    url: 'https://bundlephobia.com/api/size',
+    qs: {
+      package: packageString,
+    },
+    json: true,
+  };
+
+  /**
+   * `ErrorCode` => `error code`
+   * @param {string} code
+   * @returns {string}
+   */
+  const formatErrorCode = (code) =>
+    code.replace(/([A-Z])/g, ' $1').trim().toLowerCase();
+
+  request(requestOptions, (error, response, body) => {
+    if(typeof body !== 'object' || body === null) {
+      badgeData.text[1] = 'error';
+      badgeData.colorscheme = 'red';
+    } else if (error !== null || body.error) {
+      badgeData.text[1] = 'code' in body.error ?
+        formatErrorCode(body.error.code) : 'error';
+      badgeData.colorscheme = 'red';
+    } else {
+      badgeData.text[1] = prettyBytes(showMin ? body.size : body.gzip);
+      badgeData.colorscheme = 'blue';
+    }
+    sendBadge(format, badgeData);
+  });
+}));
+
 // Redmine plugin rating.
 camp.route(/^\/redmine\/plugin\/(rating|stars)\/(.*)\.(svg|png|gif|jpg|json)$/,
 cache(function(data, match, sendBadge, request) {
diff --git a/service-tests/bundlephobia.js b/service-tests/bundlephobia.js
new file mode 100644
index 0000000000000..041a895f38154
--- /dev/null
+++ b/service-tests/bundlephobia.js
@@ -0,0 +1,78 @@
+'use strict'
+
+const Joi = require('joi')
+const ServiceTester = require('./runner/service-tester')
+const { isFileSize } = require('./helpers/validators')
+
+const t = new ServiceTester({
+  id: 'bundlephobia', title: 'NPM package bundle size',
+})
+
+module.exports = t
+
+const formats = {
+  A: '/bundlephobia/:type/:package.:format',
+  B: '/bundlephobia/:type/:package/:version.:format',
+  C: '/bundlephobia/:type/@:scope/:package.:format',
+  D: '/bundlephobia/:type/@:scope/:package/:version.:format',
+}
+
+const data = [
+  {
+    format: formats.A,
+    get: '/min/preact.json',
+    expect: { name: 'minified size', value: isFileSize },
+  },
+  {
+    format: formats.B,
+    get: '/min/preact/8.0.0.json',
+    expect: { name: 'minified size', value: '7.94 kB' },
+  },
+  {
+    format: formats.C,
+    get: '/min/@cycle/core.json',
+    expect: { name: 'minified size', value: isFileSize },
+  },
+  {
+    format: formats.D,
+    get: '/min/@cycle/core/7.0.0.json',
+    expect: { name: 'minified size', value: '3.51 kB' },
+  },
+  {
+    format: formats.A,
+    get: '/minzip/preact.json',
+    expect: { name: 'minzipped size', value: isFileSize },
+  },
+  {
+    format: formats.B,
+    get: '/minzip/preact/8.0.0.json',
+    expect: { name: 'minzipped size', value: '3.35 kB' },
+  },
+  {
+    format: formats.C,
+    get: '/minzip/@cycle/core.json',
+    expect: { name: 'minzipped size', value: isFileSize },
+  },
+  {
+    format: formats.D,
+    get: '/minzip/@cycle/core/7.0.0.json',
+    expect: { name: 'minzipped size', value: '1.23 kB' },
+  },
+  {
+    format: formats.A,
+    get: '/min/some-no-exist.json',
+    expect: { name: 'minified size', value: 'package not found error' },
+  },
+  {
+    format: formats.C,
+    get: '/min/@some-no-exist/some-no-exist.json',
+    expect: { name: 'minified size', value: 'package not found error' },
+  }
+]
+
+data.forEach( ({format, get, expect }) => {
+  t.create(`Testing format '${format}' against '${get}'`)
+    .get(get)
+    .expectJSONTypes(Joi.object().keys(expect))
+  }
+)