The Nose Feedback Looper Deluxe is the perfect feedback pedal. Yes it creates feedback with any effect that you run through it's loop, but it also has many other features. You can switch this pedal from a feedback pedal to a true bypass pedal, it has a feedback knob and volume knob you can control with your foot, and it has a manual and auto switch for the sound. Put this pedal on manual mode and your sound only come on when the second stomp switch is held down. Very cool and purple.
Dimensions of the metal casing is 4.67" x 3.68" x 1.18".