diff --git a/.github/config/size-labels.yml b/.github/config/size-labels.yml
new file mode 100644
index 0000000..a66522c
--- /dev/null
+++ b/.github/config/size-labels.yml
@@ -0,0 +1,18 @@
+labels:
+  - name: teeny
+    max_lines: 10
+
+  - name: small
+    max_lines: 100
+
+  - name: medium
+    max_lines: 500
+
+  - name: large
+    max_lines: 2000
+
+  - name: oh lawd he comin
+    message: |
+      This PR exceeds the recommended size of 2000 lines.
+      Please make sure you are NOT addressing multiple issues with one PR.
+      Note this PR might be rejected due to its size.
diff --git a/.github/workflows/pr-size-labeler.yml b/.github/workflows/pr-size-labeler.yml
new file mode 100644
index 0000000..977f6e0
--- /dev/null
+++ b/.github/workflows/pr-size-labeler.yml
@@ -0,0 +1,19 @@
+name: PR Size Labeler
+
+on:
+  pull_request:
+    types: [ opened, reopened, synchronize ]
+
+jobs:
+  label-pr-size:
+    name: Apply Size Label
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: Apply Size Label
+        uses: lukas-kuntze/devx-action-pr-size-labeler@v1
+        with:
+          config_file: .github/config/size-labels.yml
+          github_token: ${{ secrets.GITHUB_TOKEN }}