> For the complete documentation index, see [llms.txt](https://docs.imerit.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.imerit.net/3d-multi-sensor-fusion/labeling/3d-multi-sensor-fusion-labeling-editor/key-features/preset-cuboid-dimensions.md).

# Preset Cuboid Dimensions

The Preset Cuboid Dimension allows teams to define a standard cuboid size per class - particularly useful for objects with known and consistent dimensions.

{% hint style="success" %} <img src="/files/mXHEiGg35kYjwl0I4r5p" alt="" data-size="line"> Helps reduce annotation time and improve consistency.
{% endhint %}

![](/files/16ce1e88f829f2f39e1fc707566f9bf56dc33b04)

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## Benefits

* Speeds up annotation workflows.
* Reduces human error and inconsistency across frames.
* Especially useful for frequently repeated or similarly sized objects (e.g., traffic cones, signs).

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## Steps to Use Preset Cuboid Dimensions

Preset cuboid dimensions must be pre-configured in the Recipe for each class, with the help of enabling the [Preset Cuboid Dimension](/3d-multi-sensor-fusion/labeling/3d-multi-sensor-fusion-labeling-editor/drawing-tools/cuboid.md#preset-cuboid-dimension).

{% stepper %}
{% step %}

#### Navigate to 3D or BEV

Navigate to either 3D or BEV (Bird’s Eye View) mode, depending on your preference.
{% endstep %}

{% step %}

#### Choose a class

From the Class List, choose the class for which you want to create a cuboid annotation.
{% endstep %}

{% step %}

#### Start annotating

When you begin annotating, the tool will automatically generate a cuboid using the preset dimensions associated with the selected class - no need to start from scratch.
{% endstep %}

{% step %}

#### Adjust if needed

Experts can still manually resize the cuboid if needed, but starting with a predefined size significantly reduces repetitive effort and improves consistency.
{% endstep %}
{% endstepper %}

{% hint style="info" %}
If Preset Cuboid Dimension is toggled off in the recipe, the tool will use a standard cube dimension.
{% endhint %}