A single clear ribbed glass lid for your vintage Pyrex 500 series 1-1/2 cup fridge dishes number 501, the small size dishes in the set. It will fit any vintage Pyrex colored 501 dish regardless of pattern, from the original 1947 Primary colors to the 1979 Autumn Harvest lines. The Oven to Refrigerator sets were all discontinued by Pyrex in 1981.

The lid measures 4-1/4 by 3-3/8 inches. It's in excellent, crystal clear, still glossy condition with no damage, fleabites, or scratches.