New Balance WSD100L5New Balance WSD100L5 Women's Sizing. For Mens sizing take away 1. 5 sizes eg 7 mens equals 8. 5 womens Created for short distance (that's the SD), the SD100 v5 brings new updates to New Balance's 60 400m spike. Equipped with their reliable REVlite foam for cushioning, it's backed by a Pebax spike plate sporting 6 removable spikes to give you ample energy return and grip. A secure fit is achieved through the use of a FantomFit engineered upper that