DRV8432

Hi,

I'm looking for an appropriate heat sink for a DRV8432 chip.  I will most likely be running this at 4A continuously, but I would like the option of going up to 10A.  The eval module has a heat sink sized 35w x 80l x 38t.  Is this a bare minimum?  Can I go smaller? Is there an off the shelf component?

thanks