Cast Aluminium Casserole Dish Sizes: 20cm or 24cm?
By Home & Kitchen Appliances – Morphy Richards UK | Published: 2026-11-01
Category: Buying Guides
Choose between 20cm and 24cm cast aluminium casserole dishes by matching capacity to your household size, oven space and typical recipes.
Quick answer
For one or two people, pick the 20cm (2.3L) dish; for three or more, or for batch cooking and leftovers, pick the 24cm (4.1L) dish. Both are cast aluminium and work on induction, so the decision comes down to capacity and oven fit.
Why the capacity gap matters more than the diameter
A 20cm dish holds 2.3L and a 24cm dish holds 4.1L. That is nearly double the volume, so the 24cm is not just a slightly wider pan — it changes how many portions you can cook and how much liquid fits under the lid. If you often cook for two with planned leftovers, the larger dish can be the more practical choice even in a small household.
When a smaller dish actually cooks better
A smaller dish keeps food depth reasonable for stews, braises and small roasts. If you regularly cook for one or two, a 24cm dish can leave ingredients spread too thinly, causing sauces to reduce faster and meat to dry out. The 20cm size is also easier to lift when full, which matters because cast aluminium is lighter than cast iron but still has some weight.
Oven space and hob compatibility
Both dishes are oven-safe up to 180°C and work on all heat sources, including induction. Check the internal width of your oven and the space between shelf and grill before choosing the 24cm, especially in compact ovens or combi microwaves. The 20cm dish fits more easily in small ovens and on crowded hobs.
Decision rules for choosing your casserole dish size
- Household of one or two: Choose the 20cm (2.3L) dish unless you routinely cook extra for leftovers or meal prep. If you often freeze half, size up to 24cm.
- Household of three or more: Choose the 24cm (4.1L) dish for main meals, roasts and one-pot dinners.
- Oven width under 30cm: Measure the internal width and shelf clearance first; the 20cm dish is the safer fit in compact ovens. Check the dish handles, not just the body, when measuring.
- Frequent batch cooking: Pick the 24cm dish even for a small household, because the extra capacity lets you cook once and portion for later.
Product facts
- 24cm Cast Aluminium Casserole Dish - Grey: 24cm cast aluminium casserole dish with 4.1L capacity. The larger volume suits family meals, batch cooking and recipes that need room for liquid and stirring.
24cm Cast Aluminium Casserole Dish - Grey - 20cm Cast Aluminium Casserole Dish - Blue: 20cm cast aluminium casserole dish with 2.3L capacity and a self-basting lid. The smaller size and lid help keep moisture in when cooking smaller portions, reducing waste and drying out.
20cm Cast Aluminium Casserole Dish - Blue
Who each size suits
Best for
- One or two people who want a lighter dish that is easy to lift and fits small ovens
- Cooks who mainly make stews, braises and small roasts for immediate serving
Not for
- Families of four or more, or anyone who wants generous leftovers from every meal
- Cooks who regularly entertain or batch cook for the freezer
