These Thunderbird slotted steel Conchos item # 7542-10 is a ten pack package.   They measure 2-1/4" (5.7 cm) long and are antique copper plated.  Thank you for looking. 

Dimensions:

Length 2-1/4" (5.7 cm)

Height  1-3/4" (4.5 cm)

Slots 3/8" (9.5 mm)