Rules and regulations for SIA cabin crew :
hair - black, dark brown/ if long, coil them into buns or French twists
earrings - studs, pearls
nails - bright red prescribed by the company (สายการบินระบุ spec)
toenails - bright red prescribed by the company
eyeshadow - blue or brown depending on skin tone /prescribed by the company
lipstick - few shades of bright red prescribed by the company, pink or plum - not allowed