Speedo Optimus Fins//Sizing Question

Former Member
Former Member
Need some expert help with picking the right size for these fins. They are sized for men and suggest going down "1 or 2" sizes for women. My feet are size 7.5 (women's) but I have the beginnings of bunions and wider feet. I could go with either a Small or Medium. How do they run--larger or smaller? I tried the TYR crossblades and the size small was very tight on the ball of my right foot. To the point that my foot was cramping in the fin as I was swimming. Ironically, I have the TYR EBP fins in small and they fit perfectly (I love these fins---they have gone a long way in improving my body position in the water. Thanks, in advance, for any suggestions/assistance.