Complex sentence: The cap grows to 3 to 8 inches (7.5 to 20 centimeters) across, while the stipe has a diameter of 1 to 2 centimetres.
Split into simpler sentences: The cap grows to 3 to 8 inches (7.5 to 20 centimeters) across. The stipe has a diameter of 1 to 2 centimetres.