Size is forgiving: dip them in a bucket of water and wear them as they shrink to dryness, to conform to the size of your foot. Or let them naturally stretch over time for a looser fit.
Size 34- 8.5" (5.5-6)Size 35- 8.75" (6-6.5)Size 36- 9" (6.5-7)Size 37- 9.25 (7-7.5)Size 38- 9.5" (7.5-8)Size 39- 9.75" (8.5-9)Size 40- 10.25" (10)Size 41- 10.5" (11)