# Geometry ## Model definitions ### Circle Circle geometry | Field | Type | Title (Description) | |-------|------|-------------| | `radius` | `float` | Radius | | `radius_unit` | [SizeUnit](../aind_data_schema_models/units.md#sizeunit) | Radius unit | ### Rectangle Rectangle geometry | Field | Type | Title (Description) | |-------|------|-------------| | `width` | `float` | Width | | `height` | `float` | Height | | `size_unit` | [SizeUnit](../aind_data_schema_models/units.md#sizeunit) | Size unit |