Flax Two Piece Set, Women's Size Small Or Petite 100% Linen Navy Pants and Top

Pants are size small Button up blouse tag says "petite", but I'm unsure of the size. Maybe an oversized petite small? Here are measurements: Blouse length, back of neck down excluding collar: 27.5" Blouse pit to pit buttoned: 23" Pant waist across unstretched: 13" Pant full length: 40.75" Pant inseam: 28.6"