This summer outfit for Barbie features lightweight fine cotton pants and a blouse made of soft acrylic yarn with an open neckline. Both things have no clasps.

Measurements of the finished blouse and pants

Blouse:
length from the neckline to the hem (along the corner front) - 9 cm / 3.54 inch
Chest circumference - 12 cm / 4.72 inch
Pants:
length - 14 cm / 5.51 inch
hips circumference - 11 cm / 3.94 inch

Materials

Yarn
for the blouse : Vitalgo Adeline (Romania) 100% acrylic microfiber, 50 g/170 m or 186 yds
I want to clarify that Vitalgo Adeline is a very soft acrylic yarn
for the pants: Madame tricote Maxi (Turkey) 100% cotton, 100 g/565 m or 617 yds
You can replace these yarns with any similar yarns.

Hooks
for the blouse - 3 mm
for the pants - 1.5, 1.25 mm