diff --git a/.github/labels.yaml b/.github/labels.yaml
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index 00000000..161f16ee
--- /dev/null
+++ b/.github/labels.yaml
@@ -0,0 +1,16 @@
+# Pull Request size labels
+- name: "size/XS"
+  color: "A2D9A1"
+  description: "Extra Small size PR."
+- name: "size/S"
+  color: "73BFF2"
+  description: "Small size PR."
+- name: "size/M"
+  color: "FFEB3B"
+  description: "Medium size PR."
+- name: "size/L"
+  color: "FF9800"
+  description: "Large size PR."
+- name: "size/XL"
+  color: "F44336"
+  description: "Extra Large size PR."
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diff --git a/.github/workflow/pr-size-labeler.yaml b/.github/workflow/pr-size-labeler.yaml
new file mode 100644
index 00000000..aa73a8e5
--- /dev/null
+++ b/.github/workflow/pr-size-labeler.yaml
@@ -0,0 +1,27 @@
+name: PR-size-labeler
+
+on: [pull_request]
+
+jobs:
+  labeler:
+    runs-on: ubuntu-latest
+    name: Label the PR size
+    steps:
+      - uses: codelytv/pr-size-labeler@v1
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          xs_label: 'size/XS'
+          xs_max_size: '10'
+          s_label: 'size/S'
+          s_max_size: '100'
+          m_label: 'size/M'
+          m_max_size: '500'
+          l_label: 'size/L'
+          l_max_size: '1000'
+          xl_label: 'size/XL'
+          fail_if_xl: 'false'
+          message_if_xl: >
+            This PR exceeds the recommended size of 1000 lines.
+            Please make sure you are NOT addressing multiple issues with one PR.
+            Note this PR might be rejected due to its size.
+          files_to_ignore: ''
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