Size of baking dish not mentioned

When you find a recipe with confusing ingredients or instructions, the first thing to do is to see if the recipe was posted elsewhere.

It took me fifteen seconds to find this recipe:

https://www.all-thats-jas.com/easy-ravioli-lasagna/

on the author's blog where she calls for a 9x13" casserole.

This type of online sleuthing is not specific to Food52 or even food recipes in general. It is applicable to pretty much any set of instructions posted online: auto repair, Linux system administration, household plumbing, arts & crafts, programming, whatever.

Best of luck.

From the ingredients, the total recipe volume is about 8 or 9 cups...probably fit well in a 9" square or 8x4" loaf pan.

Probably can just eyeball it depending on how many ravioli and how much meat sauce you have. It looks super not fussy. Just make sure everything fits without overflowing!