I need to know how to see if the saddle fits me.....

I am 5'10" with a 32in inseam, 130lbs.... my western saddle is 16 and then english I just ordered is a 19. I fit in my daughters size 12 western (not the stirrups, just the seat)..... I have also been riding my cousins 15 english with no complaints......but I guess I don't know what I am looking for in fit for me- I have no complaints with my western saddles fit-it feels perfect and I am comfortable in it.

What do you ride on and what are your measurements (height at least)? How do you know if it fits well, both english and western.
How do you know if the fit is wrong? (just for me, not the horse)

Your 19 will be too big.

English Saddle Seat Calculator I use this.

Is there one of these for a Western saddle... this says I need a 17 english saddle.... ugh. I hope they will let me change the size before they ship it.

Completely depends on a few factors:
- How you carry your weight (some of us, like me, carry it in the posterior)
- How long your femur is (I have a very long femur and need a more forward than average flap for CC saddles)
- How the saddle places you (i.e. Some saddles can throw you too far forwards or back)
- Different saddles fit different people completely differently.
It's so much harder than just saying "what size fits?" unfortunately. GENERALLY speaking you go up 2" from a western saddle to english, though... that's just the very basic seat size though, and doesn't factor in flap fit or any balance issues.

Bummer.....

Wooww that says I need a 15 1/2 and I ride in a 16 1/2 or 17. I probably threw it off cause im super tall (5'11) and have tiny little chicken legs hehe.

English saddles are very finicky to fit; they have very specific pressure points so you want to make sure that it's a very decent fit on the horse before you ride in it too much. You also have to make sure that it fits you well and doesn't hinder your position - the wrong saddle can put you all wrong, and the right one can work wonders.

It very much depends on brand and model. I ride in 17 A/P Collegiate, but my CC Pessoa is 17.5 (even though I was always told CC saddles usually run smaller because they are flatter). So you just never know!

I'm 5'8" and 125lbs. I have long legs but not a very big bum lol.
I generally fit a 17" english saddle for my legs but I think my butt would fit a 16in or 16.5in better -_-
Depends on the saddle entirely though.
As for western saddles, I fit my sisters 14in barrel saddle nicely but fit my 15in roping saddle a little snugger. Different brands, different fit!

I am 5'4" with a 32" inseam (I have a really strange short torso!), and am usually around 118-123 pounds. The calculator says I need a 16 1/2". I like a 17" CC english saddle, I've trail ridden in a 16 1/2" fine but most 17" fits my leg/rear better. I think the 19" is going to be way too big for you.
I ride in a 16" reinsman western saddle. Its a little bit big as I tend to slide back in the saddle going up hills, but overall I am very comfortable in it. I don't like being crammed in a saddle.