Men Womens Unisex Flyknit size conversion?

Hey,

My girl is planning on buying her first pair of men  Flyknit Trainers (black/white) tomorrow and we are really confused about Nikes size chart conversion.

She owns a pair of older womens Flyknit Lunars (2 I think) which are US 8, CM 25, EU 39. According to Nike's size chart to keep the same CM length she needs a men US 7 (corresponds with CM 25). So basically, you need to size down 1 US size from womens to men to keep the same 25 CM.

I found a pair of Flyknit Trainers Black/White for her online in men US 7 (CM 25), but the size sticker on the box says these are a womens US 8,5.

What's going on here? We use the 25 CM as a reference to pick the correct men  size and when we found the correct men size, the womens  size are 1,5 US size larger (instead of 1).

We need to decide tomorrow, anyone who has experience with this please give me some info. 

Trying them on is not an option. Flyknit trainers/racers aren't sold anywhere anymore and the seller doens't live nearby. 

Men's sizes are 1.5 smaller than women's.

bigj505 said:

Men's sizes are 1.5 smaller than women's.

Click to expand...

Yeah I thought that was the common rule, but what's up with the CM being the same but it's only 1 size smaller instead of 1,5?

William90 said:

bigj505 said:

Men's sizes are 1.5 smaller than women's.

Click to expand...

Yeah I thought that was the common rule, but what's up with the CM being the same but it's only 1 size smaller instead of 1,5?

Click to expand...

i personally wouldn't worry about that. ask this question in the flyknit thread tho.