Rect Transform Computed Properties component as seen in the Scene Inspector
The RectTransformComputedProperties component is used to get the size of a UIX element that is contained in a slot that has a RectTransform. It takes in the RectTransform reference, and then returns a LocalComputerRect, which is the local bounds of the element, and returns the BoundingRect, which is the bounding rect itself (which can be larger than the local elements from within). Most of the time, both values would be the same, except for some situations.