Moving layers from a sublayer and keep same size?

I hope there is a good way to solve this but I haven´t found it.

If you have a character holding something ( like a doll ) you add that to a sublayer to the hand so it follows the hand.
But then you want that character to put that doll in a table so you have to remove that sublayered doll outside the handlayer.

Often you have keyframes on a layer so probably the new doll layer will not have the same size ( etc ) like the one she had in the hand.

How is the best wast to keep the same size when doing an animation like this?

/ Mattias
Harmony Adv