What sizes do they come in? Simba - Odyssey March 29, 2018 01:39 Updated Follow We offer the Fitted Sheet in UK sizes Single, Double, King and Super King. Related articles Will you be releasing any other bedding to go with the sheet? How deep is your mattress, will my sheets fit? What makes the Simba sheet special? Can you make bespoke mattresses? Do I still qualify for the 100 night trial if I paid using financing?