I said octagonal in previous post, but that's not true. I did just like 357 said, sides longer than the corners. Length of handle from 5" to 6" depending on size of hand and size of blade.The wa handle I made came out to be 5 3/4”. I made it irregular octagonal (cross section wise) with the side flats being the longest the top and bottom next and the corners the shortest. It is also tapered towards the blade.