diff --git a/app/controllers/products.controller.js b/app/controllers/products.controller.js
index c65d5ca..a84ea6c 100644
--- a/app/controllers/products.controller.js
+++ b/app/controllers/products.controller.js
@@ -14,19 +14,69 @@ const cleanString = (value) =>
     ? sanitize(value, { allowedTags: [], allowedAttributes: {} })
     : value;
 
-/** Parses optional products.weight_in_ib (nullable integer, non-negative). */
+/** Matches products.weight_in_ib DECIMAL(18,10): max 8 digits before the decimal. */
+const WEIGHT_DECIMAL_PLACES = 10;
+const WEIGHT_MAX_BEFORE_DECIMAL = 8;
+const WEIGHT_MAX =
+  Number("9".repeat(WEIGHT_MAX_BEFORE_DECIMAL) + "." + "9".repeat(WEIGHT_DECIMAL_PLACES));
+
+/** Parses optional products.weight_in_ib (nullable non-negative decimal). */
 function parseWeightInIb(value) {
   if (value === undefined || value === null || value === "") {
     return { ok: true, value: null };
   }
-  const n = parseInt(String(value).trim(), 10);
-  if (Number.isNaN(n)) {
-    return { ok: false, message: "weight_in_ib must be a valid integer." };
+  const str = String(value).trim().replace(",", ".");
+  const n = Number(str);
+  if (!Number.isFinite(n)) {
+    return { ok: false, message: "weight_in_ib must be a valid number." };
   }
   if (n < 0) {
     return { ok: false, message: "weight_in_ib must be non-negative." };
   }
-  return { ok: true, value: n };
+  const rounded = Number(n.toFixed(WEIGHT_DECIMAL_PLACES));
+  if (rounded > WEIGHT_MAX) {
+    return {
+      ok: false,
+      message: `weight_in_ib is too large. Maximum is ${WEIGHT_MAX} (${WEIGHT_MAX_BEFORE_DECIMAL} digits before the decimal).`,
+    };
+  }
+  return { ok: true, value: rounded };
+}
+
+/** Returns true if a response was sent (4xx). */
+function tryRespondProductPersistenceError(error, res) {
+  if (!error || res.headersSent) {
+    return false;
+  }
+
+  if (error.name === "SequelizeUniqueConstraintError") {
+    const field = error.errors?.[0]?.path ?? "field";
+    res.status(400).json({
+      status: "failed",
+      message: `${field} already exists.`,
+    });
+    return true;
+  }
+
+  const sqlMessage = error.parent?.sqlMessage || error.original?.sqlMessage || "";
+  const errno = error.parent?.errno ?? error.original?.errno;
+  const combined = `${error.message} ${sqlMessage}`;
+
+  if (error.name === "SequelizeDatabaseError") {
+    if (
+      combined.includes("weight_in_ib") ||
+      (errno === 1264 && /weight/i.test(combined))
+    ) {
+      res.status(400).json({
+        status: "failed",
+        message:
+          "weight_in_ib is outside the range allowed by your database column (MySQL DECIMAL precision/scale). For example, DECIMAL(12,10) only allows values below 100. Either use a smaller weight, or widen the column (e.g. ALTER TABLE products MODIFY COLUMN weight_in_ib DECIMAL(18,10) NULL).",
+      });
+      return true;
+    }
+  }
+
+  return false;
 }
 
 exports.createProduct = async (req, res) => {
@@ -95,6 +145,9 @@ exports.createProduct = async (req, res) => {
   } catch (error) {
     logger.error(error.message);
     logger.error(`Stack trace: ${error.stack}`);
+    if (tryRespondProductPersistenceError(error, res)) {
+      return;
+    }
     res.status(500).send({'status':"failed",'message': "Internal server error" });
   }
 };
@@ -188,6 +241,9 @@ exports.updateProduct = async (req, res) => {
   } catch (error) {
     logger.error(error.message);
     logger.error(`Stack trace: ${error.stack}`);
+    if (tryRespondProductPersistenceError(error, res)) {
+      return;
+    }
     res.status(500).send({'status':"failed",'message': "Internal server error" });
   }
 };
@@ -441,22 +497,15 @@ exports.uploadProductsFromCSV = async (req, res) => {
               row.weight_in_ib !== null &&
               String(row.weight_in_ib).trim() !== ""
             ) {
-              const w = parseInt(String(row.weight_in_ib).trim(), 10);
-              if (Number.isNaN(w)) {
+              const wp = parseWeightInIb(row.weight_in_ib);
+              if (!wp.ok) {
                 validationErrors.push({
                   row: rowNumber,
-                  error: "weight_in_ib must be numeric",
+                  error: wp.message,
                 });
                 continue;
               }
-              if (w < 0) {
-                validationErrors.push({
-                  row: rowNumber,
-                  error: "weight_in_ib must be non-negative",
-                });
-                continue;
-              }
-              weightInIb = w;
+              weightInIb = wp.value;
             }
 
             // Validate required fields
@@ -664,9 +713,12 @@ exports.uploadProductsFromCSV = async (req, res) => {
             logger.error("CSV processing error: " + processingError.message);
             logger.error(`Stack trace: ${processingError.stack}`);
           }
-          return res.status(500).send({ 
-            status: "failed", 
-            message: processingError.message 
+          if (tryRespondProductPersistenceError(processingError, res)) {
+            return;
+          }
+          return res.status(500).send({
+            status: "failed",
+            message: "Internal server error",
           });
         }
       })
diff --git a/app/models/product.model.js b/app/models/product.model.js
index f361973..fe7e863 100644
--- a/app/models/product.model.js
+++ b/app/models/product.model.js
@@ -39,7 +39,7 @@ module.exports = (sequelize, DataTypes) => {
         allowNull: true,
       },
       weight_in_ib: {
-        type: DataTypes.INTEGER,
+        type: DataTypes.DECIMAL(18, 10),
         allowNull: true,
       },
       is_active: {
diff --git a/app/routes/routes.js b/app/routes/routes.js
index f60942d..5e652e6 100644
--- a/app/routes/routes.js
+++ b/app/routes/routes.js
@@ -1281,9 +1281,9 @@ router.post("/trigger-establishment-users-welcome-email",[verifySignature, verif
  *                 type: integer
  *                 example: "select data from unit master"
  *               weight_in_ib:
- *                 type: integer
- *                 description: Optional weight used in IPI weighting (integer).
- *                 example: 100
+ *                 type: number
+ *                 description: Optional weight used in IPI weighting (decimal, DECIMAL(18,10) in DB).
+ *                 example: 100.655214
  *               is_active:
  *                 type: boolean
  *                 example: true
@@ -1368,9 +1368,9 @@ router.get("/products/:id", [verifySignature, verifyToken],productController.get
  *                 type: integer
  *                 example: "select data from unit master"
  *               weight_in_ib:
- *                 type: integer
- *                 description: Optional weight used in IPI weighting (integer). Omit to leave unchanged; send null to clear.
- *                 example: 100
+ *                 type: number
+ *                 description: Optional weight used in IPI weighting (decimal). Omit to leave unchanged; send null to clear.
+ *                 example: 100.655214
  *               is_active:
  *                 type: boolean
  *                 example: true