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# Resource: Items

# Type: WixDataAggregatePipelineExpressions

# Action: length

# Link: https://dev.wix.com/docs/sdk/business-solutions/data/items/wix-data-aggregate-pipeline-expressions/length.md

## Description: Finds the length of a string expression.

The `length()` method configures the aggregation pipeline to find the length of the specified expression.

## Schema:

```json
 Method: length(expression)
 Description: Finds the length of a string expression.  The `length()` method configures the aggregation pipeline to find the length of the specified expression.
 Method parameters:
   param name:  expression | type: Expression | description:  Expression to find the total number of characters of. Expression must resolve to a string. Learn more about using [expressions in aggregation pipelines](https://dev.wix.com/docs/sdk/backend-modules/data/items/wix-data-aggregate-pipeline-expressions/introduction.md). 
 Return type: REFERENCE<LengthExpression>

```