Philbe pattern blue tinted oven proof glass casseroles, 1940s vintage Anchor Hocking Fire King glassware.
These are the large round roasting pans (no covers, they don't really stack together). Size is 12" across the handles, pan is 10 1/2" overall diameter x 2 1/2" deep.
One of these dishes still has the original Fire King label, never used new old store stock, priced at $1.00 (pretty expensive in its day!). One pan has been used, and has a little light scratching and soil, but no chips or cracks.