On to Part II of upholstering your chair seat. I forgot to mention two things yesterday.
1) You will need a staple gun to attach the fabric to the chair frame. I'm assuming since you are reading this blog (and hence probably found it from some kind of DIY/craft blog) that you have one of those things? If you don't, there are one million and two reasons why you should go buy one.
2.) Technically, you should cut your welting fabric on the bias (meaning you should cut the fabric on the diagonal, instead of straight strips.) This allows the fabric to bend and twist around corners and curves perfectly. However, since it would require at least one additional yard to make enough welting for one chair, I just wing it and pin and sew really, really carefully. And P.P.S-- there was some debate (internal, with me, myself and I) over whether I was using the right or wrong side of the fabric. The part of me that decided that this fabric was reversible won. If you disagree, please don't tell me because you will hurt my delicate feelings. There. Now, moving on.
Step One: Attaching the welting to the seat top.