Ball Chain by the Spool
Several of the fine Nunn Design Chains are sold in 25 feet lengths and spooled onto cards. The larger and bulkier of the Nunn Design Chains are sold on spools and vary in length depending on the chain style.
Nunn Design Chain is sold in 10, 12.5 and 25 feet increments, but the length may not be continuous. When ordering 25 feet for example, you might receive 18 feet plus 7 feet.