From website:

NL20 - KNIT NECKTIE

Both designs are knit with fingering weight yarn. Using straight needles work in St st and seam up the back. Great worked in a self-striping yarn.

SIZE: One size; 4” wide at front and 1 ¼” at back, 56” long

YARN: Fingering weight, 100 gms

NEEDLES: 10” straight #2