# Pack size

Source: https://developer.avalara.com/avatax-for-bevalc/requirements/pack-size/

# Pack size

**Element type: Required**

**Endpoints used:** [TransactionParameterModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/TransactionParameterModel/), [TransactionLineParameterModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/TransactionLineParameterModel/)

Your integration must provide a way to specify the number of taxable items in a container, such as the number of bottles in a case. This is done using the`PackSize` parameter. When configuring`PackSize` in a transaction, you must also include`Count` in the`unit` field.

```
"lines": [  {    "parameters":[      {        "name":"PackSize",        "value":"1",        "unit":"Count"      }    ]  }]
```

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