a - Length? Width? Thickness? (in cm)
b - What is the purpose?
c - Is it closed to sink?
d - Size of sink / Cook top?
e - Splash is needed?
f - Color/Edge/Finishing
g - Live edge / Straight edge?
h - Your delivery district?

Remarks:
Normally we will increase
the water proof for the above counter
top but it depends on every of situation.
The outcome of the slab/panel after 
applying the water proof will be more 
glossy.