Does the shirt stretch?

No. The fabric is woven 100% polyester with no elastane, so it gives little. Choose your usual size or size up if you want a looser fit through the chest.

How should I wash it?

Machine wash cold on a gentle cycle, or dry clean. Skip high heat in the dryer because polyester can shrink or set wrinkles, and cool-iron the ruffle if it flattens.

Is it breathable enough for summer?

It is a solid all-season shirt, but polyester traps heat more than cotton. It works for air-conditioned offices and mild days; in humid heat it will feel warmer than a cotton blouse.

How does the ruffle hem fit over trousers?

The hem flares at the hip, so it looks best untucked over slim or straight-leg trousers, or half-tucked. Over wide-leg pants the ruffle can bunch.

Is it true to size for plus sizes?

It is cut in a regular plus fit, so it follows standard sizing rather than running oversized. Check the size chart against your bust measurement, since the non-stretch fabric leaves little room.