Chatsworth can be enlarged by a cobbler by stretching the instep. I just had a pair done, added 1cm extra space to the instep as I was unable to (without a ******* struggle) get my foot in and out of the shoe. After stretching, they were wide enough from heel to instep but they were too tall from footbed to instep so I fixed that with a pair of Dr Scholl's sports inserts. They fit perfectly now. But then again, the length never was a problem. Still, stretching the instep will give you more room behind the heel.