I dislike paper napkins, and I'm not much for sewing, so I thought: why not knit some? I have a bunch of light, sport weight cotton in various colours, and with my skinniest needles (I admit, they're two slightly different sizes, 3.25 and 3.5 mm) I started a plain, stockinette square.
I used 50-65 long-tail CO stitches (the number doesn't matter too much; I used different initial cast-ons because some of my yarn was thinner, some thicker) with a 4-knit-stitch border all-round to discourage curling. For example:
CO 50 st. K first 4 rows in knit stitch.
Switch to stockinette: K one RS rows, P WS rows, but K first 4 st of each row and K last 4 st of each row on WS to form a knit border.
Do this until napkin is more or less a square, then K four more rows in knit stitch and BO.
Next, I'll look for a linen blend (and maybe matching-sized needles!) to make another batch.