A dash (-) is used to represent half sizes. For example ordering a size 8.5 would show 8.5 M on the shoebox but 8-M on the inside of the shoe itself. Alternately an 8 M would have no dash and show 8 M on the box and inside the shoe. The Jack Rogers Palm Beach sandal...the one that started it all popularized by style icon and then First Lady Jacqueline Kennedy. Beautiful leather upper. Easy slip-on style. Whipstitching enlivens upper. Thong style. Leather lining and insole. Stacked wooden heel. Leather outsole. Measurements: Heel Height: 1 in Weight: 7 oz Product measurements were taken using size 8 width M.Weight of footwear is based on a single item not a pair.