Hi Kate when we moved here in 2002 we had a yew hedge one side of our back garden 16 feet tall 7 feet thick,not quite a hedge more like a wood,The person we bought the house from said it was only 25 years old and only had the top cut out or it may have been taller,On the other side was a Leyland ii hedge the same size,We gained 14 feet more garden when they were cut down and replaced with shrubs ,Now out of control,I have found a grove of Oaks trees thanks to the Jay. Old chippy