BOODUN Road carbon fiber cycling shoes add pedals self-locking ultra-light breathable Reflective outdoor racing bicycle sneakers
Pls choose the EU SIZE according to the Internal Length of Shoes that fit your Foot Length.
The Internal Length usually be Little Bigger than your Foot Length.
Your foot length is 26.5cm.Then you should choose that size of inter length is 27cm(EU 42).
And if your foot width is larger than usual,then you can choose Internal length 27.5cm (EU43).