--- title: WeightUnit - Storefront API description: >- Units of measurement for weight, supporting both metric and imperial systems. Used by [`ProductVariant`](/docs/api/storefront/2026-04/objects/ProductVariant) to specify the unit for the variant's weight value. api_version: 2026-04 source_url: html: 'https://shopify.dev/docs/api/storefront/latest/enums/WeightUnit' md: 'https://shopify.dev/docs/api/storefront/latest/enums/WeightUnit.md' api_name: storefront api_type: graphql type: enum --- # Weight​Unit enum Units of measurement for weight, supporting both metric and imperial systems. Used by [`ProductVariant`](https://shopify.dev/docs/api/storefront/2026-04/objects/ProductVariant) to specify the unit for the variant's weight value. ## Valid values * GRAMS Metric system unit of mass. * KILOGRAMS 1 kilogram equals 1000 grams. * OUNCES Imperial system unit of mass. * POUNDS 1 pound equals 16 ounces. *** ## Fields * [Product​Variant.weightUnit](https://shopify.dev/docs/api/storefront/latest/objects/ProductVariant#field-ProductVariant.fields.weightUnit) OBJECT A specific version of a [product](https://shopify.dev/docs/api/storefront/current/objects/Product) available for sale, differentiated by options like size or color. For example, a small blue t-shirt and a large blue t-shirt are separate variants of the same product. For more information, see the docs on [Shopify's product model](https://shopify.dev/docs/apps/build/product-merchandising/products-and-collections). For products with quantity rules, variants enforce minimum, maximum, and increment constraints on purchases. Variants also support subscriptions and pre-orders through [selling plan allocations](https://shopify.dev/docs/api/storefront/current/objects/SellingPlanAllocation) objects, bundle configurations through [product variant components](https://shopify.dev/docs/api/storefront/current/objects/ProductVariantComponent) objects, and [shop pay installments pricing](https://shopify.dev/docs/api/storefront/current/objects/ShopPayInstallmentsPricing) for flexible payment options. *** ## Map ### Fields with this enum * [Product​Variant.weightUnit](https://shopify.dev/docs/api/storefront/latest/objects/ProductVariant#field-ProductVariant.fields.weightUnit)