My sister had her heart set on a cozy pajama set for her birthday, and I was happy to oblige.
I've had the Carolyn Pajamas pattern from Closet Core Patterns in my stash for years now. I made this pattern for myself several years ago.
For my sister's Carolyn Pajamas, I cut size 10 at the bust graded to a 12 at the hip for the top, and a size 12 for the bottoms.
Finally, I added a back neck facing to simplify the construction at the collar/neck. I just connected the back neck facing to the front facing and then sandwiched the collar in between the facing combo and the main bodice.