Use the
mpn
attribute to submit your product’s Manufacturer Part Number (MPN). MPNs are used to uniquely identify a specific product among all products from the same manufacturer. Shoppers might search specifically for an MPN, so providing the MPN can help ensure that your product is shown in relevant situations.
When to use
Required for all products without a manufacturer-assigned GTIN. Learn about the gtin
attribute
If the product doesn’t have a clearly associated mpn or is a custom-made product (for example, art, custom t-shirts, novelty products, and handmade products), the attribute is optional.
Format
Follow these formatting guidelines to make sure we understand the data you're submitting.
Type |
String (Alphanumeric, Unicode characters. Recommended: ASCII only) |
Limits |
1–70 characters |
Repeated field |
No |
Schema.org property (What’s this?) |
Product.mpn, Type: Text |
File format |
Example entry |
Text |
GO12345OOGLE
|
XML feeds |
<g:mpn>GO12345OOGLE</g:mpn> |
To format your data for Content API, see the
Content API for Shopping.
Guidelines
Follow these guidelines to make sure you submit high-quality data for your products.
Minimum requirements
These are the requirements you'll need to meet to show your product. If you don't follow these requirements, we'll disapprove your product and let you know in the Diagnostics page in your Merchant Center account.
- Submit any other relevant unique product identifiers. You might be required to submit the
brand
and gtin
attributes. When you submit product identifiers, we can better understand what you're selling. When we understand what you're selling, we can make your ads and unpaid listings richer and help connect users to your products. Learn more about product identifier attributes
- Use the MPN assigned by the manufacturer. Unless you’re the manufacturer, don’t use a value that you’ve created.
- Distinguish between variants.
- Use the correct MPN for each product. Typically, each variant of a product (different colors or sizes) has its own MPN, so make sure to submit the correct value. A key exception is different sizes of apparel products, where all sizes often have the same MPN.
Additional guidelines
Review each section closely to determine if the requirements apply to your country or product. If you don't follow requirements that apply to you, we'll disapprove your product and let you know in Diagnostics in your Merchant Center account.
Examples
Food and beverages

Product |
Bio Goat Milk |
title |
1l Bio Goat Milk - 1l |
brand |
Tanja’s Goat Farm |
mpn |
0614141123452 |
condition |
new |
Electronics

Product |
Google Chromecast |
title |
Google Chromecast 2 - 1080p - Wi-Fi - Black |
brand |
Google |
mpn |
H2G2-42 |
gtin |
7894892017139 |
condition |
new |
Bundles and multipacks

Product |
Google 25.3 MP Digital SLR Camera and accessories |
title |
Google 25.3 MP Digital SLR Camera Body + 35mm Lense + blue camera bag |
price |
435 USD |
google_product_category |
Cameras & Optics > Cameras > Digital Cameras (152) |
brand |
Google |
gtin |
00652810118491 |
is_bundle |
yes |
condition |
new |
mpn |
00638HAY |
Variants
If your product comes in multiple colors or sizes, you have different unique product identifiers for each of these variants. For example:

Product |
Google T-shirt |
title |
Google T-shirt - Green - Small |
price |
11 USD |
color |
green |
size |
s |
id |
9876-S-GRN |
item_group_id |
9876 |
brand |
Google |
gtin |
9504000059422 |
condition |
new |
mpn |
00638HAY |
Product |
Google T-shirt |
title |
Google T-shirt - Blue - Small |
price |
9 USD |
color |
blue |
size |
s |
id |
9876-S-BLU |
item_group_id |
9876 |
brand |
Google |
gtin |
9504000059422 |
condition |
new |
mpn |
00638NIC |
Product |
Google T-shirt |
title |
Google T-shirt - Yellow - Small |
price |
12 USD |
color |
yellow |
size |
s |
id |
9876-S-YELLOW |
item_group_id |
9876 |
brand |
Google |
gtin |
9504000059446 |
condition |
new |
mpn |
00638ANG |
Phone or tablet

Product |
Google Nexus 6 |
title |
Google Nexus 6 - 32 GB - Midnight Blue - unlocked |
price |
199 USD |
google_product_category |
Electronics > Communications > Telephony > Mobile Phones |
brand |
Google |
gtin |
0614141123452 |
mpn |
00638NAGPE |
condition |
new |
Store brand and white-label products

Product |
white label couch |
title |
3 seater couch - brown / green |
price |
799 USD |
brand |
MyStore |
gtin |
0614141123452 |
mpn |
ANG |
condition |
new |
Products without a MPN
Some products don’t have a GTIN assigned, and so you don’t need to submit one. However, if the product does have a GTIN assigned and you don’t submit it, then the product could be disapproved.

Product |
Customized Black Dress |
title |
Black Dress Customized with Your Design - Size M |
price |
32 USD |
color |
black |
size |
M |
identifier_exists |
no |
condition |
new |
is_bundle |
yes |
mpn |
(Leave blank, since the dress is custom made and doesn't have an MPN) |

Product |
Wool Scarf |
title |
Hand knitted polka dot wool scarf - orange / black |
identifier_exists |
no |
price |
15 USD |
color |
orange /black |
condition |
new |
mpn |
(Leave blank, since the scarf is custom made and doesn't have an MPN) |