Step 5: Part II -- Sewing the liners
Also, you'll need a long rectangular piece to act as a casing (X2). This should measure just a few inches longer than 2shorts and 1long side. In other words, one long side shy of a top perimeter. Finally, cut two binding pieces. These can be on the bias or just plain ol' rectancles just slightly longer than one of the long sides and about 2 1/4-3" wide.
**I used a felt pen because I A) included seam allowance in my original draft and so knew I was going to serge that edge and B) didn't care. If you care about your fabric or elect to draft your pattern on actual measurements and then add seam allowance, you may want to make a different choice: tailor's chalk, graphite, and soap are all appropriate washable substances for marking on fabric.
14. Serge. This is optional and can be done after the stitching is complete. I serged all my edges before stitching things together because I like to zone out while I finish edges and then not have to worry about it again.
15. Make the first basket liner. Begin by stitching a small side to a big side. Then do the other small side big side, then the other big side to the whole thing until you have a four-sided box. Now that your sides are stitched together, you can sew the bottom on. I'll walk you through this in pictures.
16. Check your fit. Now that you have one box complete, go put it in your basket and make sure your size is correct. If you really have doubts, you're going to want to do this as you make your pattern. And if you really, really have doubts, just remember to err on the side of too big.
17. Got a nice fit? Then continue sewing your other liner and the liner linings.