This is a Star Spin I made as a gift for a friend. It's 41" across, hope it's not too big for her table. I've made several and finally learned to construct them just as I would a pinwheel, then the centers match more evenly. Those pesky corners are still a problem, you just have to mess with them. My latest improvements on my technique are to get the strips sewed together, (1) press well, (2) STARCH them well (3) then cut. I don't have any of the "fancy" rulers, I just use the lines on my cutting board and long rulers. I imagine you could get greater accuracy with the other rulers.