Hi Jim,

Thank you for your question.

The Extra King Zip and Link mattress is made up of two 3' x 6'3" mattresses (standard single) that make a total size of 6' x 6'3" once zipped together.

We offer Zip and Link options in sizes King and above.

If you have any further questions please do not hesitate to call the office on 0161 437 4419.

Kind regards,
Amy.