I had a friend who really wanted a liner for her bicycle basket. She has a little dog that rides in the basket, and she puts a piece of cardboard in the bottom so she doesn't fall through the basket. She knows that I am a crafty sort of person, so she showed me this website and asked if I could do something similar (but without the straps to be a handbag).
I got the measurements and she bought the fabric, so all I had to do was figure out how it fits together. I've made a few purses before, so I figured the construction would be similar--make a lining, make the outside part, and stitch them together somehow.
Here is the inside:
I made a basic lining but added pockets to both sides. I also made some bias tape and stitched with an "x" to keep that key loop in place. I figured it would get pulled on a lot, so I wanted to make sure that it was secure. As you can see, I placed the key loop close to the pocket so your keys would fit nicely in the pocket.
The other side:
I didn't use a pattern, just made it up as I went along.
For the outside sashing, I originally thought that I would just sew it down. Then I realized that it has a function if you make the "bow" tighten the grip on the basket. So I made a big loop, stitched on edge between the lining and the outside, and folded over. Then I threaded through the "ribbon" that I had made. I should mention I did all of this PRIOR to actually seeing the basket in person. I think it turned out ok. I was really relieved that it fit, and very happy that the bow was found to have a functional purpose!