Fitting Guild Count how many black and white keys you have on your keyboard or piano and match it to our fitting guide. Ensure your hands are clean and the keys are grease and dust free before you apply the stickers. Placement Guild for 61 key set This is the fitting guild for any keyboard or piano up to 61 black and white keys. Placement Guild for 88 key set This is the fitting guild for any keyboard or piano up to 88 black and white keys.