Pick a banneton based on how much dough you're shaping, not on what sounds standard

A banneton (also called a proofing basket) should hold your shaped dough with about half an inch of headroom—not packed tight, not swimming loose. The size you need depends on your final loaf weight, which is the dough after mixing but before baking. A 500-gram dough needs roughly a 10-inch round banneton; a 750-gram dough needs a 12-inch; a 1000-gram dough needs a 13 to 14-inch. If your dough fills more than three-quarters of the basket or leaves more than an inch of empty space all around, the basket is the wrong size.

Bannetons come in two shapes: round (boule) and oval (batard). Round baskets are 8, 9, 10, 11, 12, and 13 inches in diameter. Oval baskets are typically 10 by 6 inches, 11 by 7 inches, or 13 by 8 inches. The number that matters most is the volume, which the seller should list in liters or grams of dough capacity. If they don't, ask before you buy—guessing from diameter alone will leave you frustrated.

Key Takeaways

  • A banneton should be sized so your shaped dough fills it about three-quarters full, leaving roughly half an inch of space at the top.
  • Most home bakers use a 10 to 12-inch round banneton, which holds doughs between 500 and 750 grams.
  • Oval bannetons work the same way but are better if you prefer to score and bake your loaf in an oval Dutch oven.
  • If your dough overflows the basket or moves around inside it, the basket is too small or too large and your loaf shape will suffer.

How dough weight determines basket size

Start by knowing your dough weight. Most home sourdough recipes make a dough between 500 and 1000 grams. Weigh your mixed dough on a kitchen scale before you shape it—that number is what you're working with.

A 500-gram dough (roughly 1 pound 2 ounces) fits comfortably in a 9 to 10-inch round banneton. A 600 to 700-gram dough needs a 10 to 11-inch basket. A 750 to 900-gram dough needs an 11 to 12-inch basket. A 1000-gram dough or larger needs a 13 to 14-inch basket or an oval basket sized for that volume. If you regularly make two loaves from one batch, each half-dough will need its own basket sized for half the total weight.

The reason this matters: if the dough is too loose in the basket, it spreads sideways during cold proof and you lose height in the oven. If it's crammed in, it can't expand enough to proof evenly, and you'll get dense spots in the crumb.

Round versus oval bannetons

A round banneton (boule shape) is the most common choice for home bakers. It's versatile—you can bake the loaf in a round Dutch oven, a covered baking vessel, or even on a preheated baking stone with a cloche. Round baskets are easier to find and usually cheaper. They're also forgiving: a boule shape is harder to mess up than an oval one.

An oval banneton (batard shape) is better if you own an oval Dutch oven or prefer a longer, narrower loaf. It's also useful if your oven is small and a round loaf won't fit. Oval baskets take up less counter space than round ones of the same volume. The trade-off is that oval loaves are trickier to shape consistently—the dough wants to round up, not stay oblong.

Both shapes work identically during proofing. The choice comes down to your baking vessel and how you like your loaf to look when sliced.

What happens when the banneton is the wrong size

If your banneton is too small, the dough will bulge over the rim during the final proof. When you flip it onto your peel or baking surface, the overhanging part will collapse or tear. You'll also get an uneven shape—the dough will be taller in the center and flatter at the edges. The loaf will bake unevenly, with the thick parts gummy and the thin parts over-baked.

If your banneton is too large, the dough will move around inside it. During cold proof, it will spread sideways instead of up. When you bake it, you'll get a flat, wide loaf instead of a tall, round one. The crust will be thicker because the loaf spent more time exposed to oven heat. The crumb will be less open because the dough didn't have enough tension to trap gas bubbles.

The fix is straightforward: buy or borrow the right size. A banneton costs between $12 and $25 new, and they last for years. It's worth getting it right the first time.

Measuring your banneton if you already own one

If you have a banneton but don't know its capacity, measure it this way: fill it with water using a measuring cup or kitchen scale. Pour the water into a bowl on your scale and note the weight in grams. One milliliter of water weighs one gram, so 1000 grams of water equals 1000 milliliters or 1 liter. That's your basket's volume.

Once you know the volume, subtract about 15 to 20 percent for the space you need to leave at the top. A 1000-milliliter basket should hold a dough around 800 to 850 grams. A 1500-milliliter basket should hold a dough around 1200 to 1300 grams. This gives you the safe range for that basket.

If you don't want to measure, a simpler test is to shape a dough you've made before and see how it fits. If it fills the basket about three-quarters full with half an inch of space at the top, the size is right. If it's tighter or looser than that, you know to adjust next time.

Banneton materials and durability

Most bannetons are made from rattan (a woven palm material) or cane (similar but tighter weave). Both work the same way during proofing. Rattan is slightly softer and more forgiving if you're rough with it. Cane is more durable and lasts longer, but it's also more expensive.

Some bannetons come with a cloth liner (usually linen or cotton). The liner prevents dough from sticking to the rattan and makes cleanup easier. If your basket doesn't have one, you can buy liners separately or use a well-floured kitchen towel. Either way, flour your liner generously before you place the dough in it—this is the most common reason dough sticks.

A banneton will last 5 to 10 years with normal use. Wash it by hand under running water (no soap—it can leave residue) and let it air-dry completely before storing. Don't put it in the dishwasher. If mold appears, soak it in a 1:1 vinegar and water solution for an hour, scrub gently, and dry it in sunlight.

Common mistakes when choosing banneton size

The biggest mistake is buying a banneton based on what you think you "should" make, not what you actually make. If you've never baked a 1000-gram loaf, don't buy a 13-inch basket. Start with a 10-inch round basket (the most common size) and see what dough weight feels natural to you. You can always buy a second basket later.

Another mistake is assuming a banneton labeled "large" will work for any dough. Basket sizes vary wildly between sellers. A "large" banneton from one maker might be a 12-inch round (good for 700 grams), while another maker's "large" is a 14-inch oval (good for 1200 grams). Always check the diameter or volume before you order.

Finally, don't skip the flour. A banneton works only if the dough doesn't stick to it. Use rice flour (it doesn't hydrate as fast as wheat flour) or a 50:50 mix of rice flour and all-purpose flour. Dust the liner heavily before you place the shaped dough in it. This takes 10 seconds and saves you from a stuck, torn loaf.

Frequently Asked Questions

Can I use a bowl instead of a banneton?

Yes. Line any bowl with a well-floured kitchen towel, place your shaped dough in it seam-side up, and proof it the same way. The shape won't be as even as it would be in a banneton, but it works. A banneton is worth buying because the ridges help support the dough and the shape is more predictable, but a bowl is a free way to start.

What if I make two different loaf sizes?

Buy two bannetons sized for each dough weight. A 10-inch for your smaller loaves and a 12-inch for your larger ones. This is cheaper than buying one huge basket that won't work for your smaller batches. Most home bakers end up with two or three baskets anyway.

Do I need to season a new banneton?

No. Wash it under running water, let it dry, flour it well, and use it. The rattan will naturally absorb flour and dough residue over time, which actually makes it work better. Don't oil it or treat it—that will make dough stick.

Can I put a banneton in the freezer?

Yes. You can cold-proof your shaped dough in the banneton in the freezer for up to 48 hours. The basket itself won't be damaged. Just make sure the dough is covered loosely so it doesn't dry out, and give it time to come to room temperature before you score and bake it.

What size banneton do professional bakers use?

Professional bakeries use bannetons sized for their standard dough weights, which are usually larger than home batches—often 1200 to 1500 grams per loaf. They also use them differently: they proof dozens at a time in a climate-controlled room. For home baking, a 10 to 12-inch round banneton covers almost all recipes you'll find.