The official IGFA measuring board looks pretty slick, if not expensive. Much of the 190cm measure is flexible, allowing you to role it up for easy storage. It is limited, though, to 190cm and I don't see that they have any provisions for measuring fish over that length.
"The new all-tackle length record category is another great means of recognizing angler achievement and also has a strong conservation message," said IGFA world records coordinator Jack Vitek. "While the IGFA does not require a fish to be killed for traditional weight category records, and many fish are indeed released alive, this is the first IGFA record category to adopt an all-release format."
Vitek added that with no need to return to the docks to weigh a catch, anglers pursuing a length record will utilize a standard measuring device, available for purchase now on the IGFA website and eventually through major fishing tackle retailers, to record the length of their catch. According to the official IGFA rules and requirements for all-tackle length records, the fish "must be measured at the site of capture and released so that it swims away on its own and in good condition."
If you're heading out for a new All Length record, make sure you learn all the rules, found here http://igfa.org/Fish/All-Tackle-Length-Rules.aspx