Here we see essentially the same shirt, one with short sleeves, and one with the kimono sleeve. Both have a soft collar.
The soft feminine look of the puff sleeve blouses at right is in keeping with the Fifties idea of womanhood.
These could also be worn with a suit.
Fabrics tended to be natural so ironing was required.
A young woman might wear a halter top in summer. The look was still very discreet and unlike today, no belly buttons are showing. Notice the high waist line on the shorts.