Just bought these from Sweetwater. They don't fit a single pedal I own. Who knew they came in two sizes?? Not me obviously All of my pedals have 'regular' switches as found on MXR, Darkglass, TC Electronics, etc.... I can't confirm, but I think these fit the rounded type switches like the switch on the right of the JHS Emperor pictured below. Again, I don't have one so I can't confirm. I have three of them. Red, orange, and green. $15 via Paypal gets you all three shipped to the lower 48 or I'll trade for 3 of the regular size. Color does not matter. Here is a link to the exact item: Barefoot Buttons V2 Standard Footswitch Cap - Green I THINK they fit the switch like on the right side of this pedal: