diff --git a/.github/workflows/pr_size.yml b/.github/workflows/pr_size.yml
new file mode 100644
index 0000000..b4a4ef7
--- /dev/null
+++ b/.github/workflows/pr_size.yml
@@ -0,0 +1,21 @@
+name: Pull Request Labeling
+
+on: [pull_request]
+
+jobs:
+  size:
+    runs-on: ubuntu-latest
+    name: Label the PR size
+    steps:
+      - uses: "pascalgn/size-label-action@v0.4.3"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          sizes: >
+            {
+              "0": "XS",
+              "20": "S",
+              "50": "M",
+              "250": "L",
+              "800": "XL"
+            }