1) Choose your main background fabric, eg. a plain cotton or linen. Cut two pieces 9cm x 23cm. I used linen for one set which I thought was a bit floppy so I ironed on some medium weight interfacing; for the cotton ones I made, I just used the material in its "virgin" state, so to speak. You decide.
2) Choose the flowery/spotty accent fabric for your napkin ring. Cut a piece 4cm x 23cm and centre this over one of the backing pieces of fabric (right side up). Sew in place along each long edge of the accent fabric.
3) Select your trimmings, suggestion is some ric-rac braid and some ribbon. Cut two pieces of each, 23cm long. Place the ric-rac braid along the long edge of your accent fabric and sew in place. I tried to position the centre of the ric-rac along the accent fabric's edge.
4) Now place your chosen piece of ribbon over the edge of the ric-rac, leaving the outer half of the ric-rac visible. Sew in place.
6) Place the two pieces of backing fabric right sides together, pin in place.
7) Stitch around the edges (I use a 1/4" seam but choose whatever suits you). Leave a gap along the centre of the one long edge, enough to be able to turn the fabric through, I'd say about 8cm. (Choose a matching thread, obviously, I just used white so you could see what I was doing!) Trim the corners and turn the fabric through. Push out the corners with a pointy object so that they are fairly squared.
8) Give everything a good press (but be careful because in my experience, ribbon can shrink under a hot iron which will make everything pucker up. Iron a test piece first at step 4 is what I would do!)
9) Blind stitch the opening shut.
10) Have fun choosing a pretty button. Overlap the edges of the napkin ring , I'd say by about 2cm and position your button centrally on top. Stitch your button in place through both edges of the napkin ring.
11) Spend silly amount of time fiddling with napkin rings and arranging your table!
Just make sure Stanley doesn't get to them first now the colder weather is setting in!