사이즈(sa-i-jeu, saijeu)
Refers to the size or measurements of clothes or shoes.
When to use
asking about clothing size, talking about shoe size, requesting size exchange
The nuance
Use 사이즈 when talking about numerical or letter-based size categories (e.g., S, M, L) indicating the garment's dimensions, focusing on the size itself.
핏(pis)
Describes the shape, style, and how clothes fit the body.
When to use
evaluating clothing style, describing fit and feel on body, recommending well-fitting clothes
The nuance
Use 핏 when focusing on how clothes fall on the body, the design, and the wearing feel, emphasizing style and fit rather than just size.