Euro Size 37 is not US Size 7.   Size 37 is US size 6 to 6.5.  Size 38 is US size 7 to 7.5.  I purchased Manolo Blahnik Size 38 and it was also listed as US size 7 which is not the case.  The shoes were too small and I was unable to return them to the seller. 

You can look on the charts and it will confirm this.