Yup.
Being able to store a doll under the bed but, SAFELY is a great move. But in terms of working out the average height of a basic bed so that a case can be slid under... i wouldn't want that job.
Considering you have to take into account the size of a doll, the material for the case, the padding etc hmm... tricky one.
And my coffee hasn't kicked in yet so i'm struggling to form proper sentences.