Stunningly Adorable Navy Blue Dress in  bead embellished lycra and there is a side split. Dress and armbands

The UNDER BUST measurement is 38"  This can EASILY stretch out 6" more.  The bra cups are generous size and they are pre-formed cups.  However, it is possible to remove these and wear your own bra underneath if you prefer.
 
The hip measurement - UNSTRETCHED - is 48" This can EASILY stretch out a further 6"

Size Guide (but check measurements): UK size 22 - 24  It could suit size 20 (but I feel a bit of stretch looks better)  and could go up to a size 26 (but length would decrease as more stretch out)