Need help with understanding what 4/0 to 6/0 reel size means

By A Mystery Man Writer

Powerhouse Collection - 'Penn Senator 6/0' saltwater fishing reel

Spinning Reel Sizes

Sold At Auction: Penn Senator 2/0 Small Game Fish Reel, 48% OFF

Penn Long Beach 66 reel ramblings - Main Forum - SurfTalk

Powerhouse Collection - 'Penn Senator 12/0' saltwater fishing reel

Sold At Auction: Penn Senator 2/0 Small Game Fish Reel, 48% OFF

Understanding Hook Sizes

Complete Fishing Hook Guide: With Hook Size Chart

Can this handle bigger grade tuna?

Penn Senator 9/0 (115L2) Review