Hyphens, En Dashes, Em Dashes

Q. Hi, I am working on a publication which uses imperial measurements and have been asked to provide the metric equivalent in parentheses. I am not sure how to deal with this when the measurements form a hyphenated compound adjective before a noun. Using an example from your hyphenation table, three-inch-high statuette, would the hyphen placement in the following conversion be reasonable? three-inch (eight-centimeter)-high statuette? Many thanks.

A. Unfortunately, that is not an option. Either eliminate the adjective (in this case, high) or reword: a statuette three inches (eight centimeters) high.