This is a size 10C/RC (Curvy/Really Curvy). According to my measurements, I should be wearing a 10SC or possibly an 8SC, so I was worried it wouldn't have enough boob room. However, when I was living in Edinburgh I had briefly popped into Pepperberry to verify my size, and the size that fit me best was actually 8RC. So I decided there was probably a range into which I could comfortably fit, and I'd heard that these tops have a little extra boob space. That turned out to be true.
The top is a perfect fit on me, somewhat to my surprise. It is a little bit low-cut, so I have to wear it with a plunge bra (Bravissimo Thea in 28J with an extender) since everything else shows. The Thea isn't exactly a show-stopped as bras go--it gets kind of saggy throughout the day and I need to occasionally rearrange things to prevent that, but I like that it doesn't show too much cleavage and is unpadded. I would feel pretty exposed wearing my Freya Deco (30GG) with this top.
I really love this top and I have also managed to scrounge up one of the sold-out gray ones to buy! The size I found for sale in the gray is a 10RC/SC, so it will have more boob space than this pink one. I'm curious to know how that will alter the fit, and will review the gray when it arrives.