Starting a fitness plan?!

Starting a fitness plan?

I have joined a gym, signed up to a t-bow class and want to remodel myself.

I used to be slim (endless gorgeous legs) and very very fit. Even taking into account that i am ten years older and have had a child, there is a lot of room for improval.

I have given my personal trainer at the gym four criteria for my fitness plan:

1. loss of two dress sizes from a uk 12/14 to a uk 8/10.
2. improvement in general aerobic fitness
3. strengthen both my back and knee muscles both damaged
4. Improve my general body condition

My trainer was fine with those, but wants me to decide what I mean by two dress sizes, in kilos.

So what weight loss am I after to achieve a 2 dress size loss?

At present I weigh 66 kilos, am 1m65 and am pear shaped.

7 lbs generally equates to losing a dress size, so just change this into kilos.
Good luck.