I was so surprised when the mattress arrived in a box.  We opened the box and the plastic packing and the mattress came alive as it "grew" into its size of a 12" queen mattress.   This is probably the most comfortable mattress I have ever had and slept on.  We ordered it after sleeping on one that a friend had..  We ordered the 12" because I like a high bed..  Highly recommend this product...  (if you want an amazing night's sleep!)  Also,  unless you are very big and very tall  order the medium!    Enjoy!!!