Today we are going to be outlining the numbering and sizing systems of Pyrex. I've tried to include photos along with each of the pieces! All Pyrex is stamped on the bottom of the dish with this kind of information. It will say Pyrex and have the number and size stamped with it as well.
The Round Casseroles are similar to the Bake Serve and Store casseroles but they get bigger in size. The smallest size is the same as the largest Bake Serve ad Store casserole. They are numbered as follows: 473 (1 qt), 474 (1.5 qt), 475 (2 qt). Each of these casseroles requires a different size lid.
In addition to the Utility Dishes, there are a number of Baking Dishes. There is an 8x8 Square Baking Dish numbered 922 (8x8x2), a 13x9 Lasagna Pan numbered 933 (3 qt), and a Loaf Pan numbered 913 (1.5 qt). These come in solid colors and in patterns.
The Round Covered Casseroles were produced in a wide range of colors and promotional patterns. They look a lot like bowls and are often found without lids which are clear. They are numbered as follows: 024 (2 qt), 023 (1.5 qt). There are Individual Round Covered Casseroles as well which are numbered 080 (8 oz).
Finally, there are Cake Pans and Pie Plates. The Cake Pan is 8.25" and numbered 221 (8.25"). The Pie Plate is 8.5" and numbered 209 (8.5").
There are a few pieces that I've left off, but these are the main sizes! Don't forget, all Pyrex is labeled Pyrex!
Check out the Pyrex Love website for more detailed information as well as tons of other useful Pyrex info! :)