diff --git a/types/gzip-size/gzip-size-tests.ts b/types/gzip-size/gzip-size-tests.ts
new file mode 100644
index 0000000000..f07d99bd50
--- /dev/null
+++ b/types/gzip-size/gzip-size-tests.ts
@@ -0,0 +1,7 @@
+import gzipSize = require('gzip-size');
+
+const string = 'Lorem ipsum dolor sit amet.';
+
+console.log(string.length);
+
+console.log(gzipSize.sync(string));
diff --git a/types/gzip-size/index.d.ts b/types/gzip-size/index.d.ts
new file mode 100644
index 0000000000..12b1899b54
--- /dev/null
+++ b/types/gzip-size/index.d.ts
@@ -0,0 +1,13 @@
+// Type definitions for gzip-size 3.0
+// Project: https://github.com/sindresorhus/gzip-size
+// Definitions by: York Yao <https://github.com/plantain-00>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node" />
+
+declare function gzipSize(input: string | Buffer, callback: (error: Error, size: number) => void): string;
+export = gzipSize;
+declare namespace gzipSize {
+    function sync(input: string | Buffer): number;
+    function stream(): NodeJS.ReadWriteStream;
+}
diff --git a/types/gzip-size/tsconfig.json b/types/gzip-size/tsconfig.json
new file mode 100644
index 0000000000..dd3dbc82c7
--- /dev/null
+++ b/types/gzip-size/tsconfig.json
@@ -0,0 +1,22 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "gzip-size-tests.ts"
+    ]
+}
\ No newline at end of file
diff --git a/types/gzip-size/tslint.json b/types/gzip-size/tslint.json
new file mode 100644
index 0000000000..e60c15844f
--- /dev/null
+++ b/types/gzip-size/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}
\ No newline at end of file