Pickup Size Comparison Vintage P-90 Fat single coil pickups. Hum-Cancelling P-90 Stacked humbuckers inside a P-90 shell. These look identical to Vintage P-90's from the outside when installed. Some Hum-Cancelling P-90's are taller in comparison to Vintage P-90's and may require the bottom of the pickup cavity to be routed deeper. P-90 Sized Humbucker Humbucker with two coils side by side inside a P-90 shell.