THIS SHOE IS BUILT ON TRICKERS 4497K BUMP TOE LAST - WIDTH FIT 5 OR US WIDTH D.
THESE ARE UK SIZING - EG UK 8 = US 9, BUT THEY DO HAVE MORE VOLUME THROUGHOUT THAN PREVIOUS ITERATIONS OF THIS SHOE. IF YOU HAVE LOW FOOT VOLUME, WE WOULD RECOMMEND WEARING WITH AN INSOLE, OR PERHAPS SELECTING A HALF SIZE DOWN.
TRICKER'S HAS SIZING INFORMATION AVAILABLE HERE. THE 4497K LAST FALLS INTO "MOST LASTS AND STYLES" IN THAT CHART.
PLEASE REACH OUT WITH ANY OTHER FIT QUESTIONS.