I bought the California king size frame ..it came with Easy instructions to follow when you  assemble.. there is a lot of pieces and at first i  had concerns about how sturdy it would be with so many pieces to put together  but I love this bed its very sturdy suitable for children or adults .. my bedding is also from Wayfair as well as my mattress the frame suggest a 10 in mattress ... My mattress is a medium firm 12 in pillow top hybrid ...very comfy and has helped some with my degenerative disc disease and chronic back pain.. thank you wayfair