60's Cream Mod Shift Dress date dress The size on the tag

The size on the tag is marked as C but I am unsure what that is

-Waist has elastic

Brand: Westlark USA

• Yellow bed jacket top

Coat is in excellent condition

60's Cream Mod Shift Dress date dress The size on the tagIconic 1960s Twiggy vibes! This dress was made in the 1960s and features a classic shift silhouette, in a soft cream fabric with a subtle chevron texture. The princess seams give it a bit of shape. It closes in the back with a zip closure. Measurements: Please note that is has been clipped on the model to simulate the proper fit. This fits like a modern size M L but please refer to below measurements. Bust: 36" flat Waist: 36" Length: 36. 5" Good