ALMOST INVISIBLE: 3 Pairs of Carved Lucite Candle Holders by George Bullio. 1970s to early 80s.

The small pair are 8 inches (20.2 cm) tall.
The medium pair are 10 inches (25.3 cm) tall.
The large pair are 12 inches (30.5 cm) tall.
All are 2 inches (5 cm) by 2.2 inches (5.3 cm) in width and depth.