Knitting For Comfort
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The crutches I've been using (and for which I'm eternally grateful) have no padding. But now that I know how to knit, I've knit up a pair of covers. Here's how:

What you'll need: worsted weight yarn, size 5 needles, tapestry needle for seams.

Cast on 30 stitches. leave a tail for sewing up seams.
knit 2 rows
purl 1 row
row 4: knit 2 together, yarn over, repeat to end of row
row 5: yarn over (or whatever method you like to add a stitch) purl to end of row
row 6-26: knit
row 27: purl
row 28: k2 tog, YO, repeat to end
row 29: purl
rows 30 & 31: knit
cast off, leaving a tail for sewing up seams.
fold knitting in half so that your cast on and cast off sections are touching. Use the tail to sew up to the lacy bit on both sides. Weave in ends or separate yarn and add beads for a decorative touch. The garter stitch gives better padding than stockinette. Picture forthcoming... the camera is in the basement and I ain't doin' stairs!