DickiesWomen's Signature Elastic Waist Scrubs Pant

I am 5'7" and ~155lb, what size should I get? I'm usually between a medium and large.

May i return this item at any dickies store in sd?

I normally wear a size 18-20 in pants. What size would I wear on your size chart?

I am 5-7'' weight 148 will the medium size fit me