Figure reports a representative selection of the assemblies most likely composing TX-100 samples. The micelles with Nagg ≤ 50 are all nearly spherical. Starting from Nagg = 107, the micelles tend to be more prolate; nonetheless, relatively spherical and oblate assemblies are also present. Larger micelles tend to show a higher degree of polymorphism. Prominently, for Nagg = 107, the relatively most abundant size sampled by Metainference, the percentage of prolate micelles can decrease from 99 % down to 66 %, among different replicas. Moreover, their aspect ratios can vary from ϵ = 1.5 ± 0.2 to ϵ = 2.3 ± 0.4.