Choose a page size for your PDF pattern. The pattern pieces will be divided into multiple sections that fit the selected page size. Each section will include clearly marked joining tabs, allowing you to align and assemble the pattern pieces accurately after printing. This ensures that even large patterns can be printed on standard home printers.

Corner radius determines how rounded the corners of the bag will be. A smaller radius creates sharper, more rectangular corners, while a larger radius results in smoother, more rounded corners.

Zip Gusset Percentage determines how much of the bag’s side is occupied by the zipper versus fixed fabric. A higher percentage means a longer zipper, allowing the bag to open wider, while a lower percentage leaves more fixed fabric for added structure and stability.

Measure the width of your chosen zipper tape.

Seam allowance is the extra fabric added around the edges of pattern pieces to allow for stitching. Standard seam allowances typically range from 0.6 cm (1/4 inch) to 1.5 cm (5/8 inch), depending on the project.

Zip Seam Allowance is the specific seam allowance used when attaching the zipper to fabric. Its size will be limited by the chosen zipper tape, as there is only so much material on either side of the zipper teeth. As a general rule, the seam allowance should not exceed one-third of the zipper tape width, though this may vary depending on the specific zipper used.