This is an item of stationery (paper or writing goods), or other small merchandise such as good-luck charms, mascot straps, et cetera.
What a warehouse find! These cloisonne pins with clutch pinbacks were produced by Kaiyodo back in 1996. Let Ayako Katagiri and Mio Kisaragi from "Tokimeki Memorial" accompany you everywhere you go, riding along on your coat or shirt lapel! Each colorful pin is a petite 3cm tall, and each one is cute as can be!