What a cheerful looking metal and enamel pin.
This pin is a chipper looking forward-facing Sonic face over the Sega logo. It is most fortunately mint on the card which helps to date it, as it uses the very old Segasonic branding there at the top. And that's what makes it unusual.
Remember: back in that era nobody else could figure out what Sonic looked like facing completely forward, but this pin does an actually amazing job of it. It's almost like modern Sonic where he looks completely cool/normal faced this way unlike the absolute mountains of 'bizzarre triangle head' you had coming out of the UK and others. With the way the eyes are positioned and the smile, he looks very cute, genuine and cheerful.
This is a great pin with quite excellent art from the 1990s. A fun find!