Hmm or maybe its 8 and a 1/4 times across th eblade.
LOL
[censored] angle.
But I guess we gotta bow down to the 1311 name .....
311....3in
511...5in
711...7in
911...9in
1311...13in
I own none of the above --Yet--
But are all of those knives a little bigger bladed than stated and the servicable edge is the number specified? IE is the blade on the 711 actually 73/4 to 8 ish from handle to tip making it 7 inches of edge minus whatever the choil is..or are they exactly 7 inches from handle to tip?
The 11 series that I have are as follows.
311: 3.5" x .187"t 8" O.A.L.
511: 5.5" x .195"t 10" O.A.L.
711: 7.5" x .250"t 13" O.A.L.
911: 9.5" x .260"t 14.5" O.A.L.
So maybe the 1311 will be 13.5" blade, 18.5 O.A.L.
I'm thinking it will have to be .250" thick in order to fit the handles in stock.