Overall: 3 x 1 1/4 x in. ( 7.6 x 3.2 x 0 cm )
Metal pin-back bar with word "SOUVENIR" accross it, attached to a small American flag with a red circular button at the button. Printed in white on the button: "50TH ANNIVERSARY - VETERANS/20TH REG'T./N.Y. VOLS./1861 - 1911". In center of button, a white cross with "20" in the center.
On back: "NEW YORK/OFFICE/WHITEHEAD/AND/HOAG CO./253/BROADWAY" and "WHITEHEAD & HOAG CO./NEWARK, N. J."
Due to ongoing research, information about this object is subject to change.