I think you might be right, but even then; the girls size target chart says hips 84cm, I cannot see how anybody with 84cm bottom would squash through the 70 cm top part, as the bra part is stitched such a way it has very little give. 

i am just sick of sellers who do not check their items before posting them, and then expecting customers to pay return postage.   i am so angry, i am in so much pain with my back, and I wanted to go to spa and for some water exercise.  I am not up to walking around shops  😞  

Have a look at the sellers sold items....she has sold that same size/style multiple times with good feedback. Maybe it's a manufacturer's error (wrong tag)?

Use the ebay MBG dispute if the seller is unhelpful....you will not have to pay the return postage.

Yes, I did look at her feedback.  But it  doesn't mean anything.  Just because 100 items are right does not mean the 101st cannot be wrong.  i sent her pictures with rule placed on the item and she said "I have no return policy".  HAHA   Interestingly, when I asked if she has another size 14 that is actually the size indicated in the Target chart for adult sizes, she first yes, and then backed out. 

When i am selling anything, I carefully inspect every item before I end it off.  Should I miss something I take responsibility. 

i cannot escalate to claim until Wednesday, but what is MBG dispute?

Use the ebay Money Back Guarantee dispute process....the seller pays the return postage if they want the item back.

If you use a paypal dispute you will have to pay the return postage.

How do I open it?  I just started from the contact seller option; can i go from there to the MBG?

In your purchase history there's a button - return this item

Here's some info on the ebay MBG

http://pages.ebay.com.au/help/policies/money-back-guarantee.html#nad

edit:   seller is unlikely to be helpful.  You've left her a lovely neg