Block copolymer self-assembly driven nanostructured materials obtain considerable attention in various fields, including alternative energy conversion, and storage devices, separation membranes, electronics, and sensors. Fundamental studies of structure-performance relationships in advanced, porous materials require tunable nanostructures where each architectural dimension including pore size and wall-thickness could be tuned independently and precisely. However, equilibrium-based strategies have limited control on the wide tunability as all characteristics are related to free-energy minimization. To resolve this challenge a kinetic-controlled approach, persistent micelle templating (PMT) is introduced that launches a new era to fine-tune small architectural feature by limiting micelle chain exchange. Here we will elaborate the idea, how the use of a block copolymer and solution processing guideline can enable PMT with unprecedented ~2Å precision.