# Ignored By Parent Size

### Introduction

`Ignored By Parent Size` determines whether the parent of an instance considers the instance when performing its sizing. This value is only used if the parent has a [Height Units](/gum/gum-tool/gum-elements/general-properties/height-units.md#relative-to-children) or [Width Units](/gum/gum-tool/gum-elements/general-properties/width-units.md#relative-to-children) of `Relative To Children`. If a parent has a `Height Units` or `Width Units` of any other value, then this value has no impact on the parent's size.

<figure><img src="/files/uUIV1Q78zDHOWIRiupkQ" alt=""><figcaption><p><code>Ignored By Parent Size</code> controls whether the parent ignores the child when performing a layout</p></figcaption></figure>


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