This is my latest and most frivolous sewing project. What use is a round bag, after all? Well, you can put things in it, and if necessary roll it down a hill. I had the idea for this bag months ago, but then got engrossed in other... well, less round projects. Now I've finally got around to it, and I'm delighted with it! Highly recommended for anyone who wants a round bag.
Because it uses bias tape, this bag is constructed right-side-out, with the bias tape then covering the messy seams. For this reason it's actually pretty simple to put together - fiddly, yes, but none of the inside-out spatial reasoning challenges of bags where you assemble the lining separately and leave a hole to pull it through, etc. etc.
The prototype is a small everyday shoulderbag size, but this tutorial is meant to inspire you - you can use the method described to make round purses and bags of all sizes. Just remember, when working out measurements: the perimetre (length around a circle) is the diametre multiplied by pi (3.14), and don't forget to add a small seam allowance to your non-circular pieces!
Someone told me about Instructables when I had already started on this bag, so the early stages are possibly a bit under-photographed. I will try to make the explanations nice and clear to make up for it.