If your proofing container is on the smaller side, and you find your dough almost spilling over the edges, it might be time for a larger basket.
After shaping, let the dough rest on the bench for a few minutes and then place it into a banneton that is lightly dusted with white flour. You’ll see above my bannetons give the dough plenty of room to relax and expand in the fridge overnight. If your proofing container is on the smaller side, and you find your dough almost spilling over the edges, it might be time for a larger basket.