Drop a dress size in 3 weeks CONT.....PLEASE ANSWER.?

Have just posted a question to see if it would be possible to drop a dress size in 3 weeks. I got some helpful answers but just wondered...im 5ft 5 and weigh about 133lbs (9st 7lbs). Does anyone know what weight i'd have to be to be size 10? or is there any girls out there who are 5ft 5 and a size 10. if so how much do you weight. I know everybody is different but i just want to see so i can workout roughly how much weight i'll have to lose. thanks.