From Bassmasters Feb 06 Volume 39, No. 2: Big Fish Stories from Texas' Best Trophy Lake.
This article discusses the ShareLunker program, and gives length/girth & weight measurements for LMB that have been caught. It also talks about a Lake called Alan Henry where a lot of these >13lb. LMB were caught.
These numbers are from 2005, and (9) fish were from Alan Henry, and (7) were from Lake Fork.
The format is Pounds - Length - Girth:
1) 13.14 26" 20"
2) 13.48 25" 22"
3) 13.45 25.5" 20.62"
4) 13.00 25.25" 20.25"
5) 13.82 25.75" 20"
6) 13.61 25.25" 21"
7) 13.68 no l/g given
8) 13.03 no l/g given
9) 13 no l/g given
I find the length/girth measurements to be fascinating.