I've asked Anatom your questions and they're "very happy to let the winner select a prize from the Anatom range, up to the prize value on offer, so absolutely no problem to supply a pair of women’s specific boots (subject to stock)."
The size of the boot for the question/answer is size 43. I've added that in to the competition question now.
Your prize question asks for weight of a size 43 boot BUT the reference on your product description is to a size 42 boot therefore it's impossible to enter the competition.
You're right - I've just checked the Anatom website and it gives the weight for a half pair of size 42 boots, which is the correct answer to the competition question. I've updated the competition question.