diff --git a/.github/workflows/pr-size-labeler.yml b/.github/workflows/pr-size-labeler.yml
new file mode 100644
index 000000000000..f80398bf5a64
--- /dev/null
+++ b/.github/workflows/pr-size-labeler.yml
@@ -0,0 +1,21 @@
+name: Pull Request Labeling
+
+on:
+  - pull_request
+
+jobs:
+
+  size-label:
+    runs-on: ubuntu-latest
+    steps:
+      - name: size-label
+        uses: "pascalgn/size-label-action@v0.4.3"
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+        with:
+          sizes: >
+            {
+              "0": "small",
+              "50": "medium",
+              "250": "large"
+            }
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 94c74775f61d..8d4beafc219a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -33,6 +33,9 @@ Color | Label | Description | Section |
 |![](https://placehold.co/15x15/33B478/33B478.png)|Discussion|Issue is being discussed. Undetermined|Indicator|
 |![](https://placehold.co/15x15/f4bd13/f4bd13.png)|Duplicate|Issue is already present|Indicator|
 |![](https://placehold.co/15x15/CD456C/CD456C.png)|Not our bug|Bug in 3rd party component|Indicator|
+|![](https://placehold.co/15x15/ededed/ededed.png)|size/small| less then 50 lines|Indicator / automatic|
+|![](https://placehold.co/15x15/ededed/ededed.png)|size/medium| more then 50 and less then 250 lines|Indicator / automatic|
+|![](https://placehold.co/15x15/ededed/ededed.png)|size/large| 250 lines or more|Indicator / automatic|
 |![](https://placehold.co/15x15/bfd4f2/bfd4f2.png)|Desktop|Graphical user interface|Indicator / automatic|
 |![](https://placehold.co/15x15/bfd4f2/bfd4f2.png)|Hardware|Hardware related - kernel, u-boot, patches|Indicator / automatic|
 |![](https://placehold.co/15x15/bfd4f2/bfd4f2.png)|Software|Framework components|Indicator / automatic|