Nice but poor fit

The shoe itself is very nice. Unfortunately, it just does not fit. The thong sits too far back for me.
I usually wear a size 41. Size 41 fit forward good, but is behind 1-2 cm too short, the heel looks over the shoe out. In the next available size (42.5), he is the front way too big, the back of the heel just as suitable.
Size 41 fits my mother (usually size 39-40) well.
So go back unfortunately