CASSEROLE/PAN SUBSTITUTION CHART
Sometimes it is just plain difficult to decide.
This may help! The following is what the author said!
I thought this little chart might help someone when making a recipe, and not sure what pan would substitute for a size you may not have.
2 quarts 8-inch square cake pan
2 1/2 quarts 9-inch square cake pan
3 quarts 13 x 9 x 2-inch cake pan
4 quarts 14 x 10 x 2-inch cake pan