diff --git a/src/transformers/removeInlineSizes.js b/src/transformers/removeInlineSizes.js
index 2fc377a6..5f497f54 100644
--- a/src/transformers/removeInlineSizes.js
+++ b/src/transformers/removeInlineSizes.js
@@ -19,12 +19,11 @@ module.exports = async (html, config = {}, direct = false) => {
 const removeInlineSizes = (mappings = {}) => tree => {
   const process = node => {
     const attrs = parseAttrs(node.attrs)
-    const tag = node.tag ? node.tag.toUpperCase() : ''
 
     Object.entries(mappings).forEach(([attribute, tags]) => {
-      tags = Object.values(tags)
+      tags = Object.values(tags).map(tag => tag.toLowerCase())
 
-      if (!tags.includes(tag)) {
+      if (!tags.includes(node.tag)) {
         return node
       }
 
diff --git a/test/test-transformers.js b/test/test-transformers.js
index 05f11edf..4e846b01 100644
--- a/test/test-transformers.js
+++ b/test/test-transformers.js
@@ -13,13 +13,24 @@ const expected = file => readFile('expected/transformers', file)
 
 test('remove inline sizes', async t => {
   const options = {
-    width: ['TD'],
-    height: ['TD']
+    width: ['table'],
+    height: ['td']
   }
 
-  const html = await Maizzle.removeInlineSizes('<td style="width:100%;height:10px;">test</td>', options)
+  const html = await Maizzle.removeInlineSizes(`
+    <table style="width: 10px; height: auto;">
+      <tr>
+        <td style="width: 100%; height: 10px;">test</td>
+      </tr>
+    </table>`,
+  options)
 
-  t.is(html, '<td style="">test</td>')
+  t.is(html, `
+    <table style="height: auto">
+      <tr>
+        <td style="width: 100%">test</td>
+      </tr>
+    </table>`)
 })
 
 test('remove inline background-color', async t => {