寸法(参考)
https://i.imgur.com/Wz2WrNC.jpg
https://i.imgur.com/8KmRJNk.jpg
https://i.imgur.com/GmpWpaa.jpg
https://i.imgur.com/v1HOC4h.jpg

裏筋から見るのも良いですよね
https://i.imgur.com/Be8g0iO.jpg