I like these wheels; however, i am worried that the lip wont be as large as the photo shows. I understand they use 20 inch wheels in the photo but i was wonder if offset has anything to do with lip size. The biger the lip the better.

 

The only Jarama 19's that fit the xB2 are:

19x8 +40 (front) with 1.25" lip (225/35 tires recommended)
19x9.5 +40 (rear) with 2.75" lip (245/35 tires recommended)

You could also run 19x8 at all 4 corners, but it sounds like you'd prefer staggered to get as much lip as possible.

 

my rear TSW is 19x9.5 +35 with 3.5 lip. so if you go with CIONIDE's recommendation, it's at least 3/4" narrower

https://www.scionlife.com/forums/viewtopic.php?t=238758

 

It wasn't so much my recommendation; as much as information as to which size would fit, and how big the lips are, on the wheel that was specified by the OP.