Green Tree Jewelry. Pig Stud Wood Earrings Made in U.S.A. Size: 0.5" x 0.5" Pig Stud Wood Earrings Trendy and colorful pig studs are cute all year! Earrings come as shown. Laser-cut wood that is extremely lightweight. Earrings are made from sustainably sourced birch wood. Displayed on sturdy earring cards we make out of 90% recycled material. Earstud is Silver Plated Brass, hypoallergenic and applied with a non-toxic water-based glue. Clear rubber earring backs included.