Which is exactly as its name suggests! The BIG pedal in question of course is the Colorsound One Knob Fuzz which is bigger than your face! That was a pedal from the 60's which sounded great and whose enclosure was mostly empty space. Now with the benefit of smaller components and enclosures, Thirty7 fx has managed to fit all that glory into the tiniest package available but it still sounds just as glorious!
Just turn that knob until the fuzz is perfect for you!