Basket - Wald
But all that aside, Wald baskets are the best I've seen, and I've seen lots of good baskets. The Walds, though, not only work right, but they look right, and they're light. The baskets are squares, not ovals, for more efficient packing. The mesh is airy, for less wind resistance when it's empty, and to minimize weight. The welds are solid and so smooth, you can carry water balloons in them without fear of nicking. Wald makes about a gazillion models, but we sell only the ones most suited to our bikes and the way we use baskets. Just one style in two sizes. Lash them (mounting hardware NOT included; just use zip ties) onto most any rack or saddlebag support, and you're ready for action. Don't forget to use a net, too.
The HUGE one is 13" x 18" x 6", weighs 1.6 pounds and holds two grocery bags side-by-side.
The MEDIUM one is 9.75" x 14.75" x 4.5", weighs 1.14lbs, and doesn't hold as much. Look at the newpapers and you'll get a good enough feel.
Side by side:
Zippin them up:
use thick zip-ties, four to six, and triple- and quadruple-wrap them. It's kind of a hassle, but it takes only about five minutes, and makes the basket nearly theft-proof. Clip the ends if you like.