What size cable organizer do most travelers actually need?

Across the specialist communities we read, the dominant advice on r/onebag and r/ManyBaggers is to size the pouch to your kit, not the other way around. A compact organizer roughly 9–10 inches long handles a phone charger, a couple of cables, a small power bank, and a travel adapter, which covers most one-bag travelers. If you're carrying a laptop brick, multiple hard drives, or camera accessories, step up to a large or double-layer model.