Women's underwear buy inquiry from Russia

We are a Russian company "*****",interesting in underwear products .
The samples in which we are interested are the simplest.
SIZE(S.M.L.XL.2XL.3XL.4XL.5XL.6XL.) 95% cotton+5% elasten
What is the weight of your dozen? We are asking for your minimum order?
What is your best price and how we could get it?
Also,the system of your minimum order if we want to put our brand.