GLAMOROUS uk brand(WORN ONCE) summer floral halter style dress size 6

This is from the brand GLAMOROUS.(only worn ONCE) Its a UK size 10 which is a US size 6 and I feel its too big for me hence why I am letting it go. I feel it would fit a size 4/6 better. Please check out measurements or ask for details. SHE is ADORABLE! You need this for summer and any beach vacation, girls night, date night or just for a warm day. When I purchased it I loved the Marilyn Monroe feel with the halter style top. The color is a white background with little tiny sage color flowers. Its so SWEET! It is strapless bra friendly, as the back comes up just around the bra line. I have only worn it once so its in EXCELLENT new like condition. The shoes and bag are not included in the picture. Measurements: ptp "15.5" (there is elastic on back so some stretch to ?"17) Hips "17" Smoke free, pet friendly, Sanuvox air filtration, antibacterial surface home.