I have created this bag for Spring with cotton but it will be perfect for Fall if you knit it with an DK yarn.
It has the following measures:
Width (bottom): approx 14” (33 cm)
Height: approx 8.5” - (21 cm)
I have added a short handle of 3.9” (10 cm)

Level: intermediate
The instructions include very detailed tutorials with many pictures, complete written instructions and 2 charts for the ribs part.
Don’t hesitate to contact me for any questions… I will answer as soon as I can.