There are a few things to consider....
The FOYER chandelier is your statement piece and sets the tone of the home.
With that in mind... you can put any style there you want.
SIZEwize...this style rarely comes in large sizes. So, you want to determine whether you want it to be visible just out your foyer window? (if you have one) Or be substantial enough for you to enjoy it in the "entry space". (hence, wider pan, longer cables etc...)
Measure your ceiling height and floor space. Draw out on your floor the diameter of this fixture and see what you think.
Too small and you will be disappointed....

I am thinking of using a crystal chandelier in my 2 story foyer. The house will have a 20ft ceiling and a foyer of 11ft x 9ft (at the narrowest)/15ft (at the widest). There is a curved staircase as well. I am having a hard time envisioning what size would work best.

Anisa, I finally installed this chandelier at my house and it looks fabulous. Take combination of both sizes, it makes it look interesting. 5-9 tubes combo will look awesome.

@ljpatel Do you have a picture you can share? acpatel714@gmail.com