I'm making a fleece robe and would like to finish the sleeves and bottom with the lettuce / ruffly edge. Does anyone know what presser foot I would use? I have a Janome 11000.

I have a Kenmore machine and a Singer 301a...both have a foot called a Ruffler. I think this foot would do what you are describing; do you have one? Good Luck and I hope that someone else gives you more options.

A lettuce ruffle? Is that where you stretch the fleece as you do a close zigzag?

I know you stretch knit fabrics to get lettuce edges. I pretty sure you do a close zig-zag stitch over edge.
Just went out and tried it, close zig-zag almost a satin stitch over edge of fabric as you stretch it. It would be good idea to practice with scraps to see how much stretch to get wave you want.

Do you have a serger? That might give you the look you're going for.

it is not the foot, that makes it ruffle..you have to STRETCH/pull the fabric really tight when you sew it and when you let go it will be ruffled...

Thanks for the help. Tried on the fleece and don't think there is enough give in the fabric. Now I know how to do this.

As always my quilting board friends have the answer.

my machine comes with a "ruffler" foot

Isn't the ruffler foot to gather the fabric to make a ruffle to attache like to the edge of the pillow or the bottom of curtains?

It seems these boards has all the answers anyone could ever ask !!