Usually, the approximate fuel line size of Husqvarna is 0.375” x 2.5”. This size will vary from Husqvarna’s model to model. The overall length is between 2 feet and 5 feet. There are also some sizes available. They are 1/8” x 1/4”, ⅛ x 3/16”, 0.08 x 0.14” (inner diameter x outer diameter).