01
Locate the stripe and compare the side fields
The stripe begins at x=18 cm and ends at x=30 cm because its width is twelve centimetres. The field to its left is eighteen centimetres wide, while the field to its right is thirty centimetres wide. The stripe’s centre is x=24 cm. The square’s centre is x=30 cm, so the stripe is displaced six centimetres to the left of centre. Keep that reference explicit: the right edge happens to meet the square’s centre line, but the stripe itself is not centred on the square.
02
Compare with a centred version using the same width
For a centred twelve-centimetre stripe, the left edge would be x=24 cm and the right edge x=36 cm, leaving twenty-four-centimetre fields on both sides. The asymmetric version changes placement rather than stripe width. Both versions give the stripe an area of 720 square centimetres within a square of 3600 square centimetres, so it occupies twenty percent of the flat graphic. That area share does not predict how much stripe will be visible after folding, tying or wrapping the design around an object.
03
Record the proposal before translating it into an object
The reusable layout card contains square dimensions, coordinate origin, stripe orientation, stripe width, edge positions, centre offset and colour choices. Add a separate production section if the graphic becomes a real object. That section should record any borders, folds, cutting changes or finishing allowances supplied by the maker. Preserve the original flat layout so a revised version can be compared with it. The worksheet defines a visual gesture precisely while leaving untested material and manufacturing questions open for the next stage.