Size 44.5 .
There is no size designation, read below for the reason why. I measured with a tape measure and I think I sized correctly. Insole length 28,8 cm, Sneaker length - 31,2 cm.
The seventh photo shows reflective elements.
This product is a limited edition collector's item. Since it was a show sample, the inside tag has been cut off. It was purchased at auction. Never been used.
These are rare items, such as those that were not mass produced or have a different design from mass produced items, they may be used in various scenes where models wear them on the runway during collection shows and photo shoots or trade shows for industry representatives. 
Without box.