# SKU options

SKU options represent any personalization or feature that customers can add to selected SKUs. They can have a price and a delay time (e.g., preparation time) and can be defined by market. The set of SKUs on which to apply a specific option can be defined by properly setting the `sku_code_regex` attribute (the RegEx maximum allowed length is **5000** chars).

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<summary>Data model</summary>

Check the related [ER diagram](https://commercelayer.io/docs/data-model/sku-options) and explore the flowchart that illustrates how the SKU option resource relates to the other API entities.

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