Mixed shades and sizes of the most commonly found "Russian Blues".
Some of these beads are on both Levin cards "Traded for slaves"
and "trade beads for central Africa" with some size variations. All are finished by hand

row 1 - 6-sided, simple tubing, average diameter: 5mm
row 2 - 7-sided compound tubing, average diameter: 9mm
row 3 - 6-sided, simple tubing, average diameter: 9mm
row 4 - 7-sided, simple tubing, average diameter: 12.5mm
row 5 - 6-sided, simple tubing, average diameter: 13mm
row 6 - 7-sided compound tubing, average diameter: 16mm
row 7 - 7-sided compound tubing, average diameter: 15mm