I have a pair of Florsheim 10 shoes in size 3E. This 10 5E is about 1/2 inch longer than the 3E, causing it to slip a bit in the heel. The 5E width is perfect. I have not yet decided to return the shoes to a size 9 1/2 as I may be able to resolve the issue by wearing thicker socks. The danger of going to a size 9 1/2 is that I could end up between half sizes and the shoe would be too small. A thicker sock might be a better solution. Absolutely perfect in width. This is the first wide enough shoe I've found. As for the length, the jury is still out.