Embody Denim (Australia)
Specializes in jeans but also produces denim jackets and skirts, intended for curvy body types up to size 22.
Offers a plus size line if denim going up to a US Size 26.
A long-established US brand. Plus size line runs up to a 24.
Not Your Daughter’s Jeans
Offers denim for curvy body types in petites, regular and tall. Plus size line runs up to 22.
Silver Jeans Company
Extended size means plus size. Can run up to a size 28 US, but runs out fast.
Classic high end jeans line up to a size 22.
*please note that there are books and blogs about pattern extensions available. No pattern can lock out a determined creator.
Also, this video is one good approach to pattern adaptation:
Fill figured lingerie shop. They have a very different definition of “loungewear.”