To add a bit more organisation to your 'Wendy', you can also add outer pockets or a zippered pouch. There is a full tutorial on how to make these in the free PDF download.
Fairly stiff fabric, such as woven cotton, canvas, denim or corduroy
You will require 2 different fabrics, with each piece measuring 100 x 55 cm (40” x 22”).
The finished bag measures 45 x 42 cm (17 3⁄4” x 16 1⁄2”) (height x width).