Thank you for your question.
The fireplace chambers on our website are a standard size.
Fireplace and stove fitters normally cut them to size on site using a cutting wheel.
If you would like a quote for a bespoke size, our sales team would be more than happy to get a price for you
Please contact them on 0845 450 8351 or email email@example.com with your size requirements.
Hope this helps?