The instructions for this project have been translated into English from another language. Consequently, the text can be a bit confusing.
However, the excellent pictures demonstrate how the basket is made.
Vlieseline is specified, which is an interfacing. We’re guessing that they used a lightweight fusible interfacing, and fused it to the back of each fabric square before the block was stitched together.
Complete the 9-patch block and sew satin ribbons to the corners. Lay the block on top of a square of batting cut to the same size. Position the lining, right side down, on top of the block and stitch around the outside edges. Leave a gap for turning.
Once the mini quilt is turned and the gap is stitched closed, sew around the outside edges. Machine quilt in the ditch and across each corner creating the pattern shown in the following photo.
Converting centimeters to inches is a bit tricky for quilt projects. However, it appears that 3″ squares are close to what was specified. That would make the background fabric and batting 8″. Quarter inch seams are used throughout.
A larger basket can be made with bigger squares. Adjust the lining and backing to fit. You may want to use a heavier interfacing so a larger basket will hold its shape.