The best necklace length for STRAIGHT type is
The necklace length that makes STRAIGHT type look the most beautiful is matinee (50.8-61cm). Matinee is around their stomach. The length makes their upper body look slender. Though simple design short necklace is not so but, they look stylisher to make their neckline cleary and simple. Matinee is the best length and longer is better for them.
(Around their stomach)
Longer than matinee
･Shorter than matinee (simple one is OK)