Marking out and drawing accurate circles is always a struggle, so use this pattern generator to draw the circles for you! It tiles the circle across multiple pages if required so it should work with any size circle and seam allowance you need.
Perfect for gym bags, stuff sacks, barrel handlebar bags etc.
Simply cut along the marked margin border of the paper, tape together then use for your projects! Make sure to print at 100% scale, or actual size, or whatever your printer offers. Measure the diameter of the inner circle against your radius ( d = radius * 2) to check it has printed accurately
Circle Radius:
Bag Height:
Units:
Seam Allowance:
Paper Size:
(assuming simply sewing in the middle of the zipper so no zip seam allowance)
See my notes on bag volume estimation to understand how this is usually an underestimate of volume
