diff --git a/src/controllers/productsController.ts b/src/controllers/productsController.ts
index 68f8e148..66817feb 100644
--- a/src/controllers/productsController.ts
+++ b/src/controllers/productsController.ts
@@ -18,23 +18,27 @@ import Order from '../database/models/order';
 import OrderItems from '../database/models/orderItems';
 
 export const createProduct = async (req: Request, res: Response) => {
+  const transaction = await sequelize.transaction();
   try {
-    const { name, description, colors } = req.body as ProductAttributes;
-    const { categoryId } = req.params;
+    const { categoryId, name, description, colors, sizes } = req.body as ProductAttributes & {
+      sizes: SizeAttributes[];
+    };
     const seller = (await req.user) as User;
     const sellerId = seller.id;
 
-    // when products exists
-    const thisProductExists = await Product.findOne({ where: { name } });
+    // Check if product exists
+    const thisProductExists = await Product.findOne({ where: { name }, transaction });
 
     if (thisProductExists) {
+      await transaction.rollback();
       return res.status(400).json({
         ok: false,
         message: 'This Product already exists, You can update the stock levels instead.',
         data: thisProductExists,
       });
     }
-    // handle images
+
+    // Handle images
     const productImages: string[] = [];
     const images: unknown = req.files;
     if (images instanceof Array && images.length > 3) {
@@ -44,34 +48,33 @@ export const createProduct = async (req: Request, res: Response) => {
         productImages.push(url);
       }
     } else {
+      await transaction.rollback();
       return res.status(400).json({
         message: 'Product should have at least 4 images',
       });
     }
 
-    // create product
-    await Product.create({ sellerId, name, description, categoryId, colors, images: productImages });
+    // Create product
+    const product = await Product.create(
+      { sellerId, name, description, categoryId, colors, images: productImages },
+      { transaction }
+    );
 
-    res.status(201).json({
-      ok: true,
-      message: 'Thank you for adding new product in the store!',
-    });
-  } catch (error) {
-    sendInternalErrorResponse(res, error);
-  }
-};
-
-export const createSize = async (req: Request, res: Response) => {
-  try {
-    const { productId } = req.params;
-    const { size, price, discount, expiryDate, quantity } = req.body as SizeAttributes;
+    // Create sizes
+    if (sizes || sizes.length > 0) {
+      for (const sizeData of sizes) {
+        await Size.create({ ...sizeData, productId: product.id }, { transaction });
+      }
+    }
 
-    await Size.create({ size, price, discount, expiryDate, productId, quantity });
+    await transaction.commit();
     res.status(201).json({
       ok: true,
-      message: 'Product size added successfully',
+      message: 'Thank you for adding new product in the store!',
+      product,
     });
   } catch (error) {
+    await transaction.rollback();
     sendInternalErrorResponse(res, error);
   }
 };
diff --git a/src/database/models/index.ts b/src/database/models/index.ts
index 6a510047..2175a462 100644
--- a/src/database/models/index.ts
+++ b/src/database/models/index.ts
@@ -1,7 +1,7 @@
 'use strict';
 
 import { Sequelize, Dialect } from 'sequelize';
-const env: string = process.env.NODE_ENV || 'development';
+const env = process.env.NODE_ENV as string;
 
 const config = require('../config/config.js');
 
diff --git a/src/routes/productRoutes.ts b/src/routes/productRoutes.ts
index a598a00f..d8a37df0 100644
--- a/src/routes/productRoutes.ts
+++ b/src/routes/productRoutes.ts
@@ -2,7 +2,6 @@
 import { Router } from 'express';
 import {
   createProduct,
-  createSize,
   deleteProductById,
   getAllProduct,
   getProductById,
@@ -20,7 +19,7 @@ import { checkUserRoles, isAuthenticated } from '../middlewares/authMiddlewares'
 const router = Router();
 
 router.post(
-  '/:categoryId/create-product/',
+  '/create-product/',
   isAuthenticated,
   checkUserRoles('seller'),
   multerUpload.array('images', 8),
@@ -34,7 +33,6 @@ router.put(
   checkUserRoles('seller'),
   updateProduct
 );
-router.post('/:productId/add-size', isAuthenticated, checkUserRoles('seller'), createSize);
 
 router.get('/', getAllProduct);
 router.get('/sizes', isAuthenticated, checkUserRoles('seller'), getAllSizes);
diff --git a/src/test/index.ts b/src/test/index.ts
new file mode 100644
index 00000000..1950c3aa
--- /dev/null
+++ b/src/test/index.ts
@@ -0,0 +1,21 @@
+import { addition } from '../controllers/testController';
+
+test('Adding 2 and 1 equals 3', () => {
+  expect(2 + 1).toBe(3);
+});
+test('Addition function adds two numbers correctly', () => {
+  // Test case 1: Testing addition of positive numbers
+  expect(addition(2, 3)).toBe(5); // Expected result: 2 + 3 = 5
+
+  // Test case 2: Testing addition of negative numbers
+  expect(addition(-2, -3)).toBe(-5); // Expected result: -2 + (-3) = -5
+
+  // Test case 3: Testing addition of a positive and a negative number
+  expect(addition(5, -3)).toBe(2); // Expected result: 5 + (-3) = 2
+
+  // Test case 4: Testing addition of zero and a number
+  expect(addition(0, 7)).toBe(7); // Expected result: 0 + 7 = 7
+
+  // Test case 5: Testing addition of a number and zero
+  expect(addition(4, 0)).toBe(4); // Expected result: 4 + 0 = 4
+});