This is a pair of clear pressed glass candle holders with vertical ribbing and delicate scalloping and "hobnail" accents.
There are 2 sizes of candle receptacles, designed to accommodate either a taper style candle or, flipped over, a slightly wider pillar candle.
The larger bases are approximately 3" in diameter and the smaller ones around 2".
I detected a little roughness around the rims of the smaller ends and, although those spots are difficult to see, I did indicate them in the last photo.
Asking $20.