The 1,2,3 How-to
Fold sturdy, not stiff 2” wide strips
Stitch them at 1/8” from edge
Weave 4×4 strips for base.
Fold strips upwards and continue vertically.
Tuck in strip ends as you move along
Use paperclips to keep weave snug.
more info / image credit : Designsponse, https://www.designsponge.com/2012/01/sewing-101-recycled-paper-basket.html