As a sewing-newbie, I've got a couple questions (with more to come). I just love this skirt and really want to do it.

1. I don't have any lastin. Can I get it at JA's? Can I make it w/out the lastin? What's the purpose of it?

2. I don't understand the reasoning on the lengths of lastin used. IOW, how do I know how long to cut it for my sized skirt?

3. Approx. how much fabric does it use for a women's Med. or Large size?

TIA to anyone who answers and thank you to Kori!!