VERY simple gullet question

I was just wondering if english saddle gullets and western saddle gullets are the same. Like if I have a 6.5 inch english gullet would I have a 6.5 inch western gullet?

I forgot to add this to the above ^ if they r not the same then do you no the comparison, like if you are a small in english then you r a 6.0 in western? Sry im giving examples but I don't no how to explain! Thanks!

I forgot to add this too! Im a mess lol! Ok...so when telling if the western saddle fits your horse do you basicly look for the same things as you would in an english saddle? I have a lot of posts with saddle questions b/c I just got my first western saddle and I have tons of questions! So if you have the ansr to this one please post! Thanks so much! :)

I was wondering this too! I've been taking english lessons since I moved to my barn, and before that I was just riding my aunts horse western and had no idea what the heak any of this saddle stuff was lol. I have no idea what the full quarter horse bars and such mean.