Interfacing?

[Lilian]

I am cutting out The Drape Dress pattern hat came with Simply Sewing magazine.  The pattern calls for lightweight iron-on knit or bias interfacing. I don't know which is best to buy for the fabric I have. It's a quite drapey jersey but it stretches in all directions. I am quite a novice with stretch fabric so it might have a name.

Can anybody suggest my best option?

[Lilian]

I was looking at this   

[BrendaP]

The one @Lilian linked to looks to be about right for what you describe.

[Lilian]

Thanks @BrendaP I knew you would know 

[Lollipop]

I would use that with stretchy stuff. I sometimes use similar with lycra when I need a bit of body.