Yes DR I'm sorry but I think you just need to think about how this all operates in real life for a while... Anyway back on topic: is your shoulder measurement for a shirt generally the same as your shoulder measurement for a jacket? Or is the jacket a slightyly smaller or larger measurement? Or should I be tryng to keep these the same? Secondly, do jackets with higher armholes generally suit those with square shoulders, while sloped shoulders suit lower armholed jackets?