J Brand jeans

I love J Brand, they're one of my favorites. I own:
"10" in skinny- I own all 6 washes
Cigarette
Pencil leg zip- black, and indigo
Lovestory- 2 washes
High rise skinny- 2 washes, black, and indigo
Bermudas
Boot cut- ink
 
Bootleg in Ink. Love the fit. I found these to be true to size, although they did stretch a tad after wearing them for awhile. The sizing does depend on the wash though; some run smaller and some larger.
 
I have the Lovestory in Charcoal and the 12" Pencil in Platinum. Love them both. I want my next pair to be the Cigarette in Ink.

I have a question for those of you (it seems like there are a lot!) with the cigarettes in ink. I've heard that this wash stretches, but how much does the waistband in particular stretch? I usually wear a 26 or 27. I tried these in a 25 and loved the fit through the leg and butt, but got a bit of the dreaded muffin top. Do you think the waist will give a little and reduce this or should I size up? Any input would be appreciated.