This is a Rossignol logo pin, which features a French rooster symbol combined with a crown and the initials "JC".The initials likely represent designer Jean-Charles de Castelbajac, who has collaborated on collections for the brand.Rossignol is a French manufacturer of alpine, snowboard, and Nordic equipment, as well as outerwear and accessories. (Google)

These items were probably used as accessories on ski gear or apparel.

They are 1 5/8” x 1.5”. The two together weigh 1.4 ounces.