Very recently, I found that there was a typo error in the atomic coordinates (O6 of Pmm2 structure in Table S6 should be changed to "0.500 0.500 0.351") in the Supplementary information of Ferroelectricity in layered bismuth oxide down to 1 nanometer. The crystal structures that best correspond to experimental observations are made publicly accessible to ensure proper access for everyone. I thank Chao Wang who brought my attention to the possible error in the Table S6.