These are 2 Coptic Christian Ethiopian crosses, one strung on a single long twisted brown leather cord 28" (71 cm) in circumference, the other on a triple strand twisted black leather cord 29" (74 cm). The metal is undetermined, probably made of coins, melted down, i.e., coin silver.

The smaller cross, on the brown cord, is from Lalibela, featuring 4 birds. It measures just under 2" wide x 3 1/8" tall (5 x 8 cm), overall.

The larger, hinged cross, on the black cord, measures 2 5/8 x 4 3/8" (7 x 11 cm)