Loungewear sets:Are there any discounts available on stylish loungewear sets?

Trapped in the house on a rainy day and not wanting to socialize,I got home very early this morning from work.I got to sleep around 8 am,fortunately.A day like this can sometimes boost my mood.It is the only day I get to hide under the covers just to sleep in my leggings,or go out dry and come back fully drenched but happy.

I have several cold days ahead since it's that time of the year and I'm looking for some loungewear sets to get me through this weather(of course with my partner).I started browsing on Alibaba and our usual retailers comparing prices because I figured maybe, if I'm going to get a few sets for me and my partner,it might save us a few bucks.

I'm thinking of ordering 4 sets but I have never ordered loungewear in bulk before.So this got me thinking,do these retailers offer discounts if I'm buying multiple sets?Like, is that volume enough to start buying at a discount when you're buying for yourself in these online stores?

Say I'm 5’7”,how do you determine the sizing when you're buying something for yourself?And for those who have ordered this type of sets,do you order a sample first or do you take your chances based on the size chart?.I don't want to buy something that fits my dog better than me.