diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ea4f9b2..66be384 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -54,6 +54,40 @@ jobs:
         run: mkdir -p build && cd build && cmake -DCMAKE_BUILD_TYPE=Debug .. && make
       - run: make cpp_test
 
+  build_nanoS:
+    needs: configure
+    runs-on: ${{ github.repository_owner == 'zondax' && 'zondax-runners' || 'ubuntu-latest' }}
+    container:
+      image: zondax/ledger-app-builder:latest
+      options: --user ${{ needs.configure.outputs.uid_gid }}
+      env:
+        BOLOS_SDK: /opt/nanos-secure-sdk
+    outputs:
+      size: ${{steps.build.outputs.size}}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Install deps
+        run: pip install ledgerblue
+      - name: Build Standard app
+        id: build
+        shell: bash -l {0}
+        run: |
+          make buildS
+          echo "size=$(python3 deps/ledger-zxlib/scripts/getSize.py s)" >> $GITHUB_OUTPUT
+
+  size_nano_s:
+    needs: build_nanoS
+    runs-on: ${{ github.repository_owner == 'zondax' && 'zondax-runners' || 'ubuntu-latest' }}
+    env:
+      NANOS_LIMIT_SIZE: 136
+    steps:
+      - run: |
+          echo "LNS app size: ${{needs.build_nanoS.outputs.size}} KiB"
+          [ ${{needs.build_nanoS.outputs.size}} -le $NANOS_LIMIT_SIZE ]
+
   test_zemu:
     runs-on: ${{ github.repository_owner == 'zondax' && 'zondax-runners' || 'ubuntu-latest' }}
     steps: