10th planet store: tights

finally got to give these a roll and, yeah fantastic!

I will just say that I love them, but you have to wear underwear with them.
I only mention that because the other spatz I have are two-ply and durable and I don't wear any gitch under them. Word.

Try not to get too excited.

I was wanting to try these, not sure if I should get small or medium though. 30" waist. Can anyone advise?