---
title: ChunkPart (latest version)
description: API reference for ibm_quantum_schemas.executor.version_0_1.ChunkPart in the latest version of qiskit-ibm-runtime
source: https://eu-de.quantum.cloud.ibm.com/docs/en/api/qiskit-ibm-runtime/ibm-quantum-schemas-executor-version-0-1-chunk-part
---

# ChunkPart

*pydantic model* `ChunkPart`

[GitHub](https://github.com/Qiskit/ibm-quantum-schemas/tree/0.10.20260723/ibm_quantum_schemas/executor/version_0_1/models.py#L181-L192)

Bases: `BaseModel`

A description of the contents of a single part of an execution chunk.

### idx\_item

*field*

Type: `int`

The index of an item in a quantum program.

### size

*field*

Type: `int`

The number of elements from the quantum program item that were executed.

For example, if a quantum program item has shape `(10, 5)`, then it has a total of `50` elements, so that if this `size` is `10`, it constitutes 20% of the total work for the item.