want a big self healing cutting mat, bigger than a3

You can get from RCSportz;
Here is the link;
https://www.rcsportz.com/index.php?route=product/product&product_id=225

However, please check with them before placing the order.
As per their address, they are in one of the most flood affected area.

A2 is a good size and I personally use this one.

http://www.amazon.in/morn-sun-cutting-mat-size/dp/B00TV0SR64/ref=sr_1_1?ie=UTF8&qid=1449514347&sr=8-1&keywords=cutting+mat

Thanks vibrant hobbies our place is clear but was accomadated with people and we will be back to work from tomorow.