# Catalog Item Variation An item variation, representing a product for sale, in the Catalog object model. Each [item](../../doc/models/catalog-item.md) must have at least one item variation and can have at most 250 item variations. An item variation can be sellable, stockable, or both if it has a unit of measure for its count for the sold number of the variation, the stocked number of the variation, or both. For example, when a variation representing wine is stocked and sold by the bottle, the variation is both stockable and sellable. But when a variation of the wine is sold by the glass, the sold units cannot be used as a measure of the stocked units. This by-the-glass variation is sellable, but not stockable. To accurately keep track of the wine's inventory count at any time, the sellable count must be converted to stockable count. Typically, the seller defines this unit conversion. For example, 1 bottle equals 5 glasses. The Square API exposes the `stockable_conversion` property on the variation to specify the conversion. Thus, when two glasses of the wine are sold, the sellable count decreases by 2, and the stockable count automatically decreases by 0.4 bottle according to the conversion. ## Structure `CatalogItemVariation` ## Fields | Name | Type | Tags | Description | Getter | Setter | | --- | --- | --- | --- | --- | --- | | `itemId` | `?string` | Optional | The ID of the `CatalogItem` associated with this item variation. | getItemId(): ?string | setItemId(?string itemId): void | | `name` | `?string` | Optional | The item variation's name. This is a searchable attribute for use in applicable query filters, and its value length is of Unicode code points.
**Constraints**: *Maximum Length*: `255` | getName(): ?string | setName(?string name): void | | `sku` | `?string` | Optional | The item variation's SKU, if any. This is a searchable attribute for use in applicable query filters. | getSku(): ?string | setSku(?string sku): void | | `upc` | `?string` | Optional | The universal product code (UPC) of the item variation, if any. This is a searchable attribute for use in applicable query filters.

The value of this attribute should be a number of 12-14 digits long. This restriction is enforced on the Square Seller Dashboard,
Square Point of Sale or Retail Point of Sale apps, where this attribute shows in the GTIN field. If a non-compliant UPC value is assigned
to this attribute using the API, the value is not editable on the Seller Dashboard, Square Point of Sale or Retail Point of Sale apps
unless it is updated to fit the expected format. | getUpc(): ?string | setUpc(?string upc): void | | `ordinal` | `?int` | Optional | The order in which this item variation should be displayed. This value is read-only. On writes, the ordinal
for each item variation within a parent `CatalogItem` is set according to the item variations's
position. On reads, the value is not guaranteed to be sequential or unique. | getOrdinal(): ?int | setOrdinal(?int ordinal): void | | `pricingType` | [`?string (CatalogPricingType)`](../../doc/models/catalog-pricing-type.md) | Optional | Indicates whether the price of a CatalogItemVariation should be entered manually at the time of sale. | getPricingType(): ?string | setPricingType(?string pricingType): void | | `priceMoney` | [`?Money`](../../doc/models/money.md) | Optional | Represents an amount of money. `Money` fields can be signed or unsigned.
Fields that do not explicitly define whether they are signed or unsigned are
considered unsigned and can only hold positive amounts. For signed fields, the
sign of the value indicates the purpose of the money transfer. See
[Working with Monetary Amounts](https://developer.squareup.com/docs/build-basics/working-with-monetary-amounts)
for more information. | getPriceMoney(): ?Money | setPriceMoney(?Money priceMoney): void | | `locationOverrides` | [`?(ItemVariationLocationOverrides[])`](../../doc/models/item-variation-location-overrides.md) | Optional | Per-location price and inventory overrides. | getLocationOverrides(): ?array | setLocationOverrides(?array locationOverrides): void | | `trackInventory` | `?bool` | Optional | If `true`, inventory tracking is active for the variation. | getTrackInventory(): ?bool | setTrackInventory(?bool trackInventory): void | | `inventoryAlertType` | [`?string (InventoryAlertType)`](../../doc/models/inventory-alert-type.md) | Optional | Indicates whether Square should alert the merchant when the inventory quantity of a CatalogItemVariation is low. | getInventoryAlertType(): ?string | setInventoryAlertType(?string inventoryAlertType): void | | `inventoryAlertThreshold` | `?int` | Optional | If the inventory quantity for the variation is less than or equal to this value and `inventory_alert_type`
is `LOW_QUANTITY`, the variation displays an alert in the merchant dashboard.

This value is always an integer. | getInventoryAlertThreshold(): ?int | setInventoryAlertThreshold(?int inventoryAlertThreshold): void | | `userData` | `?string` | Optional | Arbitrary user metadata to associate with the item variation. This attribute value length is of Unicode code points.
**Constraints**: *Maximum Length*: `255` | getUserData(): ?string | setUserData(?string userData): void | | `serviceDuration` | `?int` | Optional | If the `CatalogItem` that owns this item variation is of type
`APPOINTMENTS_SERVICE`, then this is the duration of the service in milliseconds. For
example, a 30 minute appointment would have the value `1800000`, which is equal to
30 (minutes) * 60 (seconds per minute) * 1000 (milliseconds per second). | getServiceDuration(): ?int | setServiceDuration(?int serviceDuration): void | | `availableForBooking` | `?bool` | Optional | If the `CatalogItem` that owns this item variation is of type
`APPOINTMENTS_SERVICE`, a bool representing whether this service is available for booking. | getAvailableForBooking(): ?bool | setAvailableForBooking(?bool availableForBooking): void | | `itemOptionValues` | [`?(CatalogItemOptionValueForItemVariation[])`](../../doc/models/catalog-item-option-value-for-item-variation.md) | Optional | List of item option values associated with this item variation. Listed
in the same order as the item options of the parent item. | getItemOptionValues(): ?array | setItemOptionValues(?array itemOptionValues): void | | `measurementUnitId` | `?string` | Optional | ID of the ‘CatalogMeasurementUnit’ that is used to measure the quantity
sold of this item variation. If left unset, the item will be sold in
whole quantities. | getMeasurementUnitId(): ?string | setMeasurementUnitId(?string measurementUnitId): void | | `sellable` | `?bool` | Optional | Whether this variation can be sold. The inventory count of a sellable variation indicates
the number of units available for sale. When a variation is both stockable and sellable,
its sellable inventory count can be smaller than or equal to its stockable count. | getSellable(): ?bool | setSellable(?bool sellable): void | | `stockable` | `?bool` | Optional | Whether stock is counted directly on this variation (TRUE) or only on its components (FALSE).
When a variation is both stockable and sellable, the inventory count of a stockable variation keeps track of the number of units of this variation in stock
and is not an indicator of the number of units of the variation that can be sold. | getStockable(): ?bool | setStockable(?bool stockable): void | | `imageIds` | `?(string[])` | Optional | The IDs of images associated with this `CatalogItemVariation` instance.
These images will be shown to customers in Square Online Store. | getImageIds(): ?array | setImageIds(?array imageIds): void | | `teamMemberIds` | `?(string[])` | Optional | Tokens of employees that can perform the service represented by this variation. Only valid for
variations of type `APPOINTMENTS_SERVICE`. | getTeamMemberIds(): ?array | setTeamMemberIds(?array teamMemberIds): void | | `stockableConversion` | [`?CatalogStockConversion`](../../doc/models/catalog-stock-conversion.md) | Optional | Represents the rule of conversion between a stockable [CatalogItemVariation](../../doc/models/catalog-item-variation.md)
and a non-stockable sell-by or receive-by `CatalogItemVariation` that
share the same underlying stock. | getStockableConversion(): ?CatalogStockConversion | setStockableConversion(?CatalogStockConversion stockableConversion): void | ## Example (as JSON) ```json { "item_id": null, "name": null, "sku": null, "upc": null, "pricing_type": null, "price_money": null, "location_overrides": null, "track_inventory": null, "inventory_alert_type": null, "inventory_alert_threshold": null, "user_data": null, "service_duration": null, "available_for_booking": null, "item_option_values": null, "measurement_unit_id": null, "sellable": null, "stockable": null, "image_ids": null, "team_member_ids": null, "stockable_conversion": null } ```