Amazon calculates a product's star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers and factors that establish reviewer trustworthiness.
I initially ordered size 41 EU which was a tight fit, and hence ordered 42 which was too big. Looking at the huge difference I thought of replacing again with 41EU just to give one more try and Voila!! the new 41 size was a perfect fit. I saw some complaints about color but I got the same color as shown in the image. Very happy with it.