Duncan & Miller No. 152 Patio Line Candleholders in Chartreuse with Cutting
Introduced in 1952 and only made for a few years
They measure about 1 5/8 inches high and about 3 3/8 inches square.
Known in Crystal and this color they called Chartreuse, but also possible in Biscayne Green and Key Largo. This pair has nice floral cuttings (different on each piece).
Reference The Glass Candlestick Book, Felt/Stoer. Volume 1, page 169.