diff --git a/README.md b/README.md
index e7a5e307..5c5b6792 100644
--- a/README.md
+++ b/README.md
@@ -767,6 +767,15 @@ https://youtu.be/dQw4w9WgXcQ
 
 </details>
 
+#### Options
+
+All options should go under the `YouTube` namespace.
+
+| name   | Type     | Required | Default | Description                  |
+| :----- | :------- | :------- | :------ | :--------------------------- |
+| height | `string` | ❌       | 100%    | Height of the YouTube iframe |
+| width  | `string` | ❌       | 315     | Width of the YouTube iframe  |
+
 ## Options
 
 ### customTransformers
diff --git a/src/__tests__/transformers/YouTube.js b/src/__tests__/transformers/YouTube.js
index 2843aec9..ad4cee71 100644
--- a/src/__tests__/transformers/YouTube.js
+++ b/src/__tests__/transformers/YouTube.js
@@ -138,13 +138,24 @@ cases(
 );
 
 test('Gets the correct YouTube iframe', async () => {
-  const html = await getHTML('https://youtu.be/dQw4w9WgXcQ');
+  const html = await getHTML('https://youtu.be/dQw4w9WgXcQ', {});
 
   expect(html).toMatchInlineSnapshot(
     `<iframe width="100%" height="315" src="https://www.youtube-nocookie.com/embed/dQw4w9WgXcQ?rel=0" frameBorder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowFullScreen></iframe>`
   );
 });
 
+test('Gets the correct YouTube iframe with custom dimensions', async () => {
+  const html = await getHTML('https://youtu.be/dQw4w9WgXcQ', {
+    width: '50%',
+    height: '50%',
+  });
+
+  expect(html).toMatchInlineSnapshot(
+    `"<iframe width=\\"50%\\" height=\\"50%\\" src=\\"https://www.youtube-nocookie.com/embed/dQw4w9WgXcQ?rel=0\\" frameBorder=\\"0\\" allow=\\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\\" allowFullScreen></iframe>"`
+  );
+});
+
 test('Plugin can transform YouTube links', async () => {
   const markdownAST = getMarkdownASTForFile('YouTube');
 
diff --git a/src/transformers/YouTube.js b/src/transformers/YouTube.js
index 8f3ba343..2ef2e371 100644
--- a/src/transformers/YouTube.js
+++ b/src/transformers/YouTube.js
@@ -45,8 +45,10 @@ export const getYouTubeIFrameSrc = (urlString) => {
 
   return embedUrl.toString();
 };
-export const getHTML = (url) => {
+export const getHTML = (url, { width = '100%', height = '315' }) => {
   const iframeSrc = getYouTubeIFrameSrc(url);
 
-  return `<iframe width="100%" height="315" src="${iframeSrc}" frameBorder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowFullScreen></iframe>`;
+  return `<iframe width="${width}" height="${height}" src="${iframeSrc}" frameBorder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowFullScreen></iframe>`;
 };
+
+export const name = 'YouTube';