All 5 cm thick. 6 squares smallest is 23 x 27cm to give an idea of size. Preferably to go together but I will split if no takers for all.
I probably have more insulation pieces- similar but bigger pieces though won't be going to where they are until later this week, so anyone interested watch this space!!
Insulation board squares (Wigmore HR6)
This offer has been gifted to someone and is no longer available.