Our French reproduction bed frames are made to fit USA size mattresses. Our beautifully carved beds are new and are made to fit USA California King, King, Queen, Full and twin mattress. We can also build the frames to accommodate adjustable beds and sleep number beds. For this option we would require you to inform us that your bed is indeed adjustable. We do export our furniture also so we do also custom made the bed frames to accommodate other mattress sizes too. There are some clients who may require custom made bed frame to accommodate 2 full size beds too, usually using adjustable beds; we can help with that also. The French style beds are made with slats for your mattress to sit on or we can make them without slats for you to use your boxspring and mattress. Contact us regarding our French style bunk beds too.