Hi Pamela Perry, 
 
Thanks for your question, 
We can make bespoke sizes in our Artisan Range. 
Our bespoke Artisan mattress making service does carry an additional 10% charge for each 6-inch increment, for example.
Eg. The Artisan Naturals in a kingsize (5’ x 6’6”) is £1140 (June 2018) including delivery. If you require a mattress that was 5’ x 7’ then this would be an additional 10% on the standard Artisan Naturals kingsize price taking the total to £1280.
In order to place an order for bespoke size mattress please contact the office directly for a quote. This is only available with products from the Artisan range. Our friendly team can talk you through the options if you prefer over the phone on 0161 437 4419.