Thinking of getting this for my wife but am worried about size. She's petite, well was petite before she got preggers. She's still petite but w/ a belly. She usually wears an xtra small in North Face. Should I get her an extra small, eventhough her belly isn't or get her a small instead.

Tech Specs:

Material:

Terrapin softshell 

Lining:

Brushed fleece 

Core Venting:

No 

Pockets:

2 Hand, 1 internal 

Seam Taped:

No 

Hood:

Yes, faux-fur lined 

Removable Hood:

No 

Zip-in Compatibility:

No 

Recommended Use:

Staying comfy around town 

Manufacturer Warranty:

Lifetime 

Country of Origin:

China