Just because the provider is Petite and small doesn't mean her vagina is tight.   I think most of you know what i am talking about.    I had a tall skinny girl with fairly small hips and she was super tight, as tight as any girl i have met.    so Is there a way to tell just from body type or some other way ?

Sample the goods.

Be prepared for her to tell that she's plenty tight but that you're just too small.

I see a 60+ year old mother of two and she is about as tight as anyone I've ever met.

Often times a BBW is also fairly tight.

I don't think you can predetermine this fact by age or body type.  You just have to stick your toe in the water and see for yourself.

There are fat cells and layers in every body part, the vagina too, BBW are supposed to be tighter. I'm a provider and never been with a BBW but some clients told me about this.

Also dependent on whether or not she practices her kegels on a daily basis. A provider can have kids, but if she's been doing her kegels throughout it, you'll never be able to even tell she even had kids.... unless she tells you. But, as someone else pointed out, you wouldn't know this until you "tried out the merchandise".