You can size down one for less oversized in this waffle knit top with a light lining. Ash has a black tanks underneath for reference and is pictured in the xl with room 

Details

Cap Sleeve U Neck 

Brand: Andree By Unit

Color: Ivory

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 XL and large less oversized 

Fabric Fit & Feel

75% Poly 25% Rayon

T-shirt Soft

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 31 Inches

Bust width: Medium 46 Inches | 2X 52 Inches