The Classic Planner Inserts Collection is where it all started. Designed for those who want a minimal, functional, and beautiful planning system, the Classic Collection features The Line's most-loved layouts — from weekly and daily planners to habit trackers, expense logs, and more. Clean lines, generous white space, and premium 32lb paper designed to fit standard 6-ring binders and disc systems in A5, A5 Slim, Half Letter, Personal, and Personal Wide sizes. This is the insert collection that started it all — and it's still our bestseller.