I think this works with an extender as far as the band. I got it to check cup dimensions and fit rather than whole bra fit. The straps are THIN. I might invest in some pads to put under them. The cups fit well except for folds at the bottom, which I think are orange-in-a-glass results, and the lace across the top of the cups is loose... not so much that it shows under clothes, but I’m a perfectionist, so I wish it could just be slightly taken in at the gore on both sides to close the cup slightly and make it follow the top of my boobs better. So I guess the fullness is too much on the top and not enough in the bottom of the cups? Or maybe it’s still just that the cups are still a bit too tall and a bit too wide, actually. It’s a pretty bra though.