Dutch Oven Size Chart
A Dutch oven traps the loaf's own steam during the first half of the bake, which is what produces oven spring and a crackling crust. Size it wrong and the loaf either touches the walls and scorches, or spreads flat in a pan too wide to support it. This chart matches Dutch oven capacity to dough weight.
Capacity by loaf size
3.5 quart / 3.3 litre: loaves up to about 600g total dough weight. Suits small boules and single-person bakes.
4.5-5 quart / 4.3-4.7 litre: 700-900g dough, the most common home sourdough size and the best single-purchase choice for a standard 1kg-flour recipe split into two loaves.
5.5-6 quart / 5.2-5.7 litre: 900-1200g dough, comfortable for a large boule with room for full expansion.
7 quart / 6.6 litre and up: very large loaves or double batches, though the extra headspace means the loaf's steam is more diluted, which slightly reduces the crust effect.
Round versus oval
Round Dutch ovens suit boules, the classic round sourdough shape, and are the more common choice. The shape supports the dough evenly as it springs.
Oval Dutch ovens suit batards (oblong loaves) and are the better fit if you prefer that shape or want to slice sandwich-friendly pieces. An oval pan bakes a boule fine, but a round pan forces a batard to slump toward round.
If buying one pan for everything, round is the safer default since batard dough can be shaped as a boule but not the reverse.
Lid clearance matters more than capacity
The number that actually matters is vertical space between the dough and the underside of the lid, because a loaf that rises into the lid gets a flat scorched top and loses its scoring pattern. A well-fermented sourdough can nearly double in height during the first fifteen minutes.
Shallow braisers and wide casserole dishes often list a generous quart capacity but have little height, which makes them poor sourdough vessels despite the number on the box. Check the depth, not just the volume.
Material and alternatives
Enamelled cast iron is the standard: excellent heat retention, no seasoning needed, and the light interior makes it easy to see browning. The main caution is that many manufacturers rate the knob to a lower temperature than sourdough baking requires, so check the knob rating or swap it for a metal one.
Bare cast iron combos (a shallow pan with a deep lid) are popular because the loaf is loaded onto the flat base rather than lowered into a deep hot pot, which is meaningfully easier and safer. Cloches and steel Dutch ovens work on the same principle. Any lidded vessel that holds heat and traps steam does the job; the shape and clearance matter more than the brand.