Here is a really lovely Fire King glass Jadeite cup and saucer manufactured by the American company Anchor Hocking. There are rare enough in the USA but they never turn up in the UK! The green glass is pale but really vivid and the square shape is just great.
Saucer 13.8cm width
Cup 5.5cm high
Fire King is similar to pyrex so this is really tough. Condition wise it’s in excellent vintage condition with only the very lightest signs of use.