A hole diameter of 25mm to 32mm is suitable for fitting the 7" tap and 30mm to 34mm is suitable for 8" wooden taps. A 38mm to 44mm diameter hole is suitable for fitting a 10" tap.
Pleasantly surprised by the speedy delivery of both my orders (2 + 1 large 1/4 barrels) and have recommended the company to friends and family. Ms Magill, Milton Keynes