Size up one for busty women.  Ash is a 16 and in the 1X (normally an XL).

Details

Ruffle Cap and Collar Sleeveless

Brand: White Birch

Color: Navy

Sizing

S (2-6) | M (8-10) | L (12-14) | XL (16-18) | 1X (18-20) | 2X (20-22) | 3X (22-24)

Ashley (Size 16 regular and 40H bust) wears size 1X

Fabric Fit & Feel

100% Poly 

Relaxed fit with room in the tummy (Taco friendly :-) 

Measurements (approximate and taken while laying flat)

Length from shoulder to bottom seam: Medium 27 Inches | 2X 29 Inches

Bust width: Medium 37 Inches | 2X 46 Inches