There is quite a bit of stretch to this dress. Thought it says it's a 3X and I'd say it's closer to an 18/20.
There is a slit on the left side. The slit is 31in from hem to end. The entire skirt is lined with the edges on the slit hemmed together so it doesn't move weird when you walk.
Measurements
Bust 48in and has moulding cups
Waist band 46in
Skirt length 44in from under bust to hem