58 buick seat size?

anyone tell me the width of a 1958 buick 4 door or 2 door seat width front and rear?thanks for the help

 

According to a GM interchange parts manual I have, there are several sizes for 58 buick.
2dr
Special & century 59 X 27 7/8
Super and Roadmaster 60 1/4 X 29 5/8
4dr
spec & Century 57 3/4 X 56 7/8
super, roadmaster & ltd. 61 1/4 X 61 1/2

Unfortunately this book does not list the Back Seats
Hope this helps.