How to make it is described in the subtitles.
I'm sorry if it's difficult to understand because of automatic translation.

[Short sleeve flower motif sweater]
size: cropped, short sleeve
fit: oversized
style: square neck, puff sleeve

chest 96cm, waist 84cm
Acrylic yarn [40g(1.4oz), 68m(223ft)] ×6

The flower motif is made of felt balls.